How to Set a (Realistic) Target SAT Score

When you’re preparing to take the SAT for the first—or maybe second or third—time, it can be difficult to know where to start. Before you even start studying, it’s important to set a goal for your SAT scores—while staying realistic, of course. Not sure where to begin? Here’s your guide to setting a (realistic) target SAT score. While you want to aim as high as possible, it’s important to keep yourself in check . Understand where you’re starting in order to figure out how much you can improve. Take a formative assessment to gauge your starting point. This type of practice test will give you a read on what skills you have now and which ones you still need to learn and practice. Learn more about the importance of this test in What Is a Formative Assessment and Why Should I Use One to Study? . Remember that your initial score is likely to go up as you study and prepare for the SAT. Use the formative assessment to consider which studying strategies are best for you. For instance, if you’re strong in reading but weaker in geometry problems and formulas, you may want to implement a â€Å"formula of the day† to memorize. First and foremost, you should be looking for colleges that are the right fit —not just in terms of rankings, prestige, and difficulty of admission, but those that align with your values and interests. While you’re reviewing colleges , make note of the average test scores at the schools that interest you. You can usually find the middle 50% SAT score range, meaning the range from the 25th percentile and to the 75th percentile of the most recent freshman class. You should aim to fall at least in the middle of this range. If you’re closer to the 25th percentile, it’s not a deal breaker, but it does make the school more of a reach. Our students see an average increase of 250 points on their SAT scores. Many scholarships base awards on SAT scores among other factors. Identify these scholarships early on, so you know what you need to do and what scores you need to earn to achieve them. Winning these scholarships can help you with college costs. Learn more in How Your SAT Scores Can Help You Earn Scholarships and Getting a Head Start on Your Scholarship Search . Use your PSAT score as a starting point, as well as previous SAT scores. While you will improve with studying, as well as simply learning more information in school, your PSAT can give you a rough starting pointing. Learn more about interpreting your PSAT scores in What Does My PSAT Score Mean? . Use information such as practice tests, your PSAT, and the average scores of the colleges on your list to set a realistic target score for the SAT. You should also factor in and consider how much time you’ll have for prepping and studying. Make a plan and stick to it. Then you can start working on achieving your goals. For more advice on preparing for the SAT, read: Looking for some more help for acing the SAT? The SAT Tutoring Program will help you achieve top scores on your test. We’ll pair you with two private tutors, one for English and writing, and one for math and science. All of our tutors have scored in the 99th percentile on the section they are teaching and are chosen based on teaching skills and ability to relate to their students. How to Write the University of Pittsburgh Essays 2018-2019 The University of Pittsburgh (colloquially known as Pitt) is a large research university established in 1787. Located in the industrial city of Pittsburgh, Pitt is home to 17 schools and over 19,000 undergraduate students. With an acceptance rate of 60%, Pitt was ranked 26th out of all public universities in the United States by U.S. News & World Report in 2018. The university has a thriving academic community, over 350 student clubs and organizations, and is known for its positive campus atmosphere; in 2010, it was rated as having one of the top 10 happiest student bodies in the country. The University of Pittsburgh strongly encourages applicants to write three short essays, granting potential students a great opportunity to showcase multiple facets of their personality, experiences, and interests. Read on for tips to help you master these essays and boost your chances of acceptance into one of the happiest and highest-ranking public schools in the country! This prompt provides you the space to demonstrate your   passions ,   initiative , and   desire to help others . Whether the impact you have made is large or small, the essay should show how you possess each of these qualities. Some good example topics for this essay: While the first example is on a â€Å"macro† scale, the second, more â€Å"micro† example can be equally as powerful if told well. If you decide to go with a smaller-scale impact, make sure it is written as a   story ; use descriptive details that really make the reader feel as though they were also there. While you should be descriptive and   show instead of tell   no matter what you are writing about (see guide to the prompt below for more details on showing vs. telling), it is especially important when writing about an experience that could seem trivial if it is not well-described. Be sure to also illustrate the impact; for instance, for the second example above, the writer could incorporate dialogue between herself and the student when he expresses his gratitude for her reaching out to him. Submit your essay and we’ll get back to you with helpful edits. As briefly discussed in our guide   How to Write the Common Application Essays 2018-2019 , the best response to this question should demonstrate how the intersection of your personality, interests, skills, and analytical-thinking abilities creates a distinctive combination — one that would allow you to contribute in an idiosyncratic way to the college to which you are applying. Taking it one step farther, UPitt is also looking for your ability to reflect. What evidence do you have of your uniqueness? What experiences can you point to that showcase your individuality? You will likely be doing some storytelling here, so it’s extremely important to   show and not tell. Here’s an example of the difference between the two: Note that the â€Å"showing† example also   avoids using any overused adages or clichà ©s , as such sayings can diminish the strength of the experience or emotion you are trying to convey. For example, when explaining the difficulties that come with growing up, writing â€Å"the inevitable blemishes of adolescence† is more distinct and illustrative than saying something like â€Å"the rollercoaster that is high school.† For some of you, this essay will be easy to start – maybe you’ve got an odd family tradition, an uncommon identity, a niche hobby, or even a peculiar birthmark that you could write about. In that case, be sure to point to specific experiences; you could focus on just one moment and tell the story with rich detail, or skillfully connect a few experiences together into one cohesive narrative. The key is to demonstrate your uniqueness through real-life examples and show how this uniqueness will translate into helping you excel at UPitt. But what if you don’t have some extraordinarily special aspect of life to point to? Don’t worry – most of the world doesn’t. The key is to remember that you are still unique! Your specific life experiences, background, personality, interests, and a million other things form a special combination that really cannot be found in anyone else. Try writing out all of your interests, skills, and passions, and then lift out a few from the list. Next, think about how these things come together and make you special. Are there any experiences that show how you, having your distinctive mixture of these separate identities or interests or abilities, were able to meet a challenge, relate to a stranger, help a peer, or learn something new about yourself? Really dig deeply into what you believe is truly unique about you, weave a story that features an experience or two demonstrating that uniqueness, and then show how this will help you contribute something distinctive to UPitt that nobody else can. With this prompt, UPitt wants to see your creativity and problem-solving skills. In other words, you should show the admissions office how you think . The key is to think small when answering this question: what’s a problem you see, and how would you fix it? We suggest you stay away from big national or global issues like â€Å"zero hunger† or â€Å"world poverty.† However, you may be able to concentrate on smaller, more specific issues within these broad zones, and most likely, the problem you’re interested in solving will be somehow related to family or interests or specific life experiences. (Bonus points if you can combine multiple areas of specialty together, drawing on your skills and experiences from two or more different academic or extracurricular areas!) The key takeaway here is that this prompt does not require a well-tested research project that’s been presented at multiple conferences — just pick any problem you see in your daily life and come up with a creative solution for it! As a word of caution, the only constraint is the word limit. While you have 750 words, the UPitt admissions office likely prefers the 200 to 300 range that they’ve suggested. In your answer, you should aim to have a brief background of what inspired your idea, an explanation of your idea, and the potential impact you’d like to see it cause. If you present something that requires a great deal of highly technical explanations, try your best to simplify it down so that any person walking down the street can understand your proposal. And worse comes to worst, pick something else! Remember: your actual product, process, business, or organization doesn’t matter so much as your inspiration and process – the story of your creativity, problem-solving, and compassion. Want help on your Pitt application or essays? Learn about our   College Apps Program. Want us to quickly edit your college essay? Submit it to our   Rapid Review program , and we’ll get it back to you quickly with comments from our expert team.

Public relation Essay Example | Topics and Well Written Essays - 2500 words

Public relation - Essay Example ns having democratically oriented cultures and governments; rather, it could be argued that the historic affinity between democracy and capitalism fosters the greater use of public relations practice in capitalistic economic systems while one could submit the corollary proposition that symmetrical practice of public relations inevitably will encourage nondemocratic nations to become more democratic’. The power of public relations to influence the opinion of the public even in severe issues like the political system of a particular state can be sometimes a threat for the market especially in cases where the targeted opinion has been formulated and imposed after a severe pressure from the party that will gain significant profit both directly or indirectly. However, in many cases public relations can lead to positive outcomes. For this reason, Levy (2002, 34) stated that ‘PR power used early can not only reduce the consequences of human error and frailty but also help create positives -- more business, a better legislative climate and improved standing with the media -- via mass media coverage on social service activities; PR can make advertising claims more credible, and give the claims more impact, because when the mass media tell scores of millions that something is so, the ads that follow are not only more trusted but more interesting’. As an example to the above assumptions, the case of Wal – Mart is presented by the above researcher in an effort to support the credibility of his statements. More specifically, the research made in the area has revealed the existence of a case where public relations led to an increase of the performance of the company involved. As Levy found ‘Wal-Mart has increased its sal es of high school class rings -- at 2,800 stores and online -- by including "how to buy" information in news releases; the stories make potential customers feel more comfortable about buying (Levy, 2002, 34). From a similar point of view it has been

Socially Responsible Investing Coursework Example | Topics and Well Written Essays - 10500 words

Socially Responsible Investing - Coursework Example As the report stresses  the subsequent results revealed that the SRI has not been able to outperform the conventional investment funds rather have clearly underperformed. However, the SRI has been able to experience higher growth rate in the United States of America and Europe and other parts of the world. Overall, this performance reflects that the SRI funds and SRI indices have experienced a reasonable growth over the period of last 13 years and there has been a steady and stable upward growth in the SRI, reflecting that more and more investment is being done in the SRI.According to the paper findings  the conventional investment has considerably violated the ethical and moral standards. In the conventional investment, the firms do not take into account the interests and expectations of society instead they prefer to serve their commercial objectives at the cost of society.  This paper is consisted of five parts: introduction, literature review, methodology, data analysis and discussion and conclusion and recommendation chapter. In the introduction chapter, some background information about the SRI has been provided in which the historical development of the SRI has been provided. In addition, in this chapter, research aim, questions, objectives and limitations have also been included.  Subsequently, in the literature review chapter, a comprehensive critical evaluation of the SRI has been provided in which history and definition of the SRI have been detailed and discussed as well.

Public Administration Beckons Essay Example | Topics and Well Written Essays - 500 words

Public Administration Beckons - Essay Example The desire to make a living while providing for the basic needs of as many people as possible was born out of idealism and was nurtured by experience. I have always been both awed and fascinated by the intricate workings of government, the noble and delicate task of balancing the often scarce human and material resources to administer the executive-branch functions of government - international relations, environmental sanitation and conservation, mail delivery and providing for the general health, education and welfare of the citizenry. Public administration calls for a deep sense of responsibility and organization, foresight, leadership and a way with people. It also requires a steep grounding in accounting and management. In municipal and state governments, public administration means running programs on a multitude of concerns such as health, highway, fire, police, water, transportation, electricity, gas, care of parks and recreation facilities, development of natural resources, public housing and urban renewal. A public administrator sees to the proper staffing pattern for sanitation services, clerical and maintenance connected with the above functions. You will never find a more edifying set of challenges in other careers or professions where self-interest is the chief motivation for work.

Vinegar as a Rust Remover | Experiment

Vinegar as a Rust Remover | Experiment Abstract Despite the vast research regarding rusting, still many people do not recognize the harmful effect it can to environment and to take precaution measure to avoid or prevent rusting. Results of study show U.S. had to spend total $276 billion, approximately 3.1% of the nations Gross Domestic Product (GDP) for corrosion direct cost. Therefore, these study is to find optional of artificial way to remove rusting from any other metal. For my research, I choose vinegar as a substance that has the potential to remove the rust stain from metal due to presence of acid in its content. Vinegar is easy to be obtained and usually use as households. I choose three different types of vinegar brands and analyzed its percentage by mass of acetic acid using acid-base titration technique. Then, I test the strength of each vinegar on rate of removing rust on rusted iron nail by removing the rust form. After that, I compare which vinegar has the highest rate of removing rust compared to its percentage by mass of acetic acid. As the result, I found out that different type of vinegar has different percentage by mass of acetic acid. But my experiment shows that, the higher percentage of acetic mass in the vinegar content, does not always lead to high rate of rust stain removal. These maybe due to my limitation of the research because I assumed that only acetic acid in vinegar reacts with the iron(III) oxide. Still, my research able to prove that vinegar can act as a potential rust stain remover but in low degree because acetic acid is weak acid. My research could help and provide people an easy way to remove rust from their accessories as vinegar could be easily obtained. 1. Introduction Vinegar can be define as a sour liquid obtained by result through acetic fermentation of dilute alcoholic liquids and used as a condiment or preservative. Aside from utilized widely, vinegar also can accommodate more than one purpose which usually used to enhance food taste. Vinegar is made through two stage of biological processes. These distinct process resulted from the action of innocuous microorganisms. In these process, yeast and Acetobacter is used to convert sugars (carbohydrates) into acetic acid. The first stage of process is called alcoholic fermentation. It occurs when yeasts convert natural sugars to alcohol under controlled conditions. In the second stage of process, Acetobacter which is a group of bacteria, changes the alcohol resulted from alcoholic fermentation to acid. This is the acid fermentation that forms vinegar. Since vinegar can be made from anything with sugar, there are probably too many variants to count made in countries throughout the world.[1](Kellen, 2 005, Vinegar Institute Site) Rust is define as the red or orange coating that forms on the surface of iron when exposed to air and moisture surroundings, consisting mass of ferric hydroxide. These ferric oxide is formed through oxidation. Rust forms due to the reaction of oxygen dissolved in dihydrogen monoxide(water) with iron. Rust also can be known or called as corrosion of metal.[2] (Holleman, Wiberg, 2001 Inorganic Chemistry Academic Press: San Diego) Rust is a general term to describe several different oxides that formed when an iron undergo corrosion. Some of the oxides are Fe(OH)2, Fe(OH)3, FeO(OH), and Fe2O3.H2O. The prevalent rust that can be found is a reddish-brown, Fe2O3.H2O. The oxygen in the air dissolve in water and promote the rust to start to compose. The rust also can be determine as an electrochemical process. The process of exchange of electrons (electricity) is conducted by chemical reactions in part of the electrical circuit. The surface of metal that exposed to electrolyte will undergo series of chemical reactions. Oxidation reactions (corrosion) occur at the surface of the anode while reduction reactions occur at the surface of the cathode.[3] (Jones, Denny (1996)  Principles and Prevention of Corrosion.) By observation, we could descried that rust occurs very easily because the presence of air and water or wet condition virtually presence anywhere. We could see around ourselves rusting is occur greatly. Rust changes steel into a different material, one that is impuissant or weaker than the original steel. Rusting is a immensely colossal problembecause so many things people use every day are made out of steel, like cars, bicycles, trucks, bridges, roofs, holding tanks, machinery, nuts, and bolts. When these objects are unprotected and exposed to water, they rust, and this damage can costs a lot of money. Rust also dangerous to human because a rusting iron nail can cause health issue such as tetanus if the iron nail pierce to human skin. Yet steel perpetuates to be widely used because it has an excellent strength-to-weight ratio. Also known as the best of all the common building materials. In addition, it is non-flammable, resistant to mold and termites, does not expand or contract und er temperature changes, and can be made with a consistent quality.[4] (Miller, L. (2003, July 31).  Corrosion). Therefore, we must take alert and precaution about rusting of these iron metal. The topic that be investigated in this extended essay is about rusting or corrosion and the way to prevent rust. Thus, my research question is to analyse the percentage by mass of acetic acid in different type of vinegar brands by using titration method and to investigate the potential of vinegar as rust stain remover. Therefore, my extended essay required two experimental procedures. My hypothesis for first experiment is that different types of vinegars have different percentage by mass of acetic acid. If the result of experiment one parallel with my hypothesis, second experiment could be carried out which is to investigate the potential of vinegar as rust stain remover. My hypothesis for second experiment is that the higher the percentage by mass of acetic acid in vinegar, the more efficient the vinegar to act as rust stain remover. The significant of my research is to investigate a cheapest and easiest way to remove rust. In this research, I choose vinegar as the potential method to remove stain rust because vinegar contain acetic acid . Vinegar could be easily found and present almost in every living house. Because acid is corrosive, it occur to me that the acid could corrode the rust stain from metal. To test the validity of my statement, a research and experimental procedure is carried out to justify the validity of my research question. The chosen area of study is rusting since my experiment focus more on rusting. These experiments included several methods such as acid base titration. Vinegar is acidic. Therefore, it will be titrated with base solutions, sodium hydroxide. The titration method is carried out to find the volume of base needed to neutralize the acid solution of vinegar. These method is essential for the experiment to find the percentage by mass of acetic acid in vinegar. Second method is rusting of iron nail. I could not choose any random iron nail to conduct my experiment because the result will not be accurate and precise as they could have different degree of rusting. Therefore, I buy iron nails that not rusted yet and undergo experimental procedure for the iron nails to rust under constant condition. These method needed to carry out so that the iron nails undergo rusting in constant activity. Then, the iron nails could be tested with the vinegar. In my experiment, I used some instrument from the chemistry laboratory. The instruments I used is pH meter. The pH meter is used to find the pH of different type of vinegar. I also use burette which is necessary for the titration method. The burette is used to find the volume of base needed to neutralise the acidic solution. I also used electronic balance to weigh the iron nails initial mass before in undergo rusting and the final mass after the iron nails undergo rusting. Stopwatch is used to record the time taken for the acid to remove the rust stain. *Due to some error, all the pictures for the experiment have loss. 2. Methodology: 2.1 Variables and method of controlling variables Variable type:  Independent Variable:  Different type of vinegar brands Method of controlling:  By using vinegar of different brands for the experiment. Variable type:  Dependent Variable:  Volume of sodium hydroxide needed to neutralize acid solution Method of controlling:  By measured the volume of sodium hydroxide needed to neutralize acid solution using burette. Variable type:  Controlled Variable:  Volume of vinegar used Method of controlling:  Fixed the amount of vinegar is used for the experiment which is 2.0 ml. Variable:  temperature Method of controlling:  The experiment is conducted in same room Variable:  Volume of distilled water added Method of controlling:  Fixed the amount of volume distilled water added in the vinegar. Add phenolphthalein Method of controlling:  By adding 3 drops phenolphthalein to every vinegar solution in conical flask during experiment. Variable:  Concentration of sodium hydroxide Method of controlling:  By fixed the concentration of sodium hydroxide used which is 1.0 M. Table 1 : Variables for experiment to determine the percentage by mass of acetic acid in vinegars Variable type Variable Method of controlling Independent Type of vinegar used By using vinegar of different brands for the experiment. Dependent Time taken to remove the rust stain By recorded the time taken for different type of vinegars to remove the rust stain on the iron nail using stop watch. Controlled Type of metal By using the same metal throughout the experiment which is iron nail. Temperature The experiment is conducted in same room Using same electronic balance By using the same electronic balance to weigh the mass of iron nail. Time for iron to rust Fixed the time for the iron to rust which is 7 days or i week Using same stopwatch By fixed the type of stopwatch used to record the time taken. Table 2 : Variables for experiment to determine the time taken for the vinegars to remove rust 2.2 Methodology for neutralisation process To find the percentage by of acetic acid in different types of vinegar brands, a neutralisation process follow the standard procedure is carries out. First , the apparatus is set up . The burette is clamped on the retort stand. Then, 2.0 ml of vinegar is measured using measuring cylinder. An empty conical flask is weighed. Then 2.0 ml vinegar which is Earth Brand is poured in the conical flask. The conical flask is weighed again. This procedure has to be carried out to find the mass of 2.0 ml of vinegar assumed that different vinegars has different density. After that, 48.0 ml of distilled water is measured using measuring cylinder. Then, the distilled water is mixed with the vinegar in the conical flask. This procedure has to be carried out because vinegar is very concentrated so dilution process has to be done. The pH mater is used to find the pH value of vinegars. After mixed, the initial weight of vinegar with conical flask is measured using weighing balance. Then , sodium hydroxide is filled in the burette. The conical flask is placed under the burette. 3 drops of phenolphthalein is added into the diluted vinegar. The neutralisation process is started as soon the alkali is added into the conical flask. The sodium hydroxide is assumed to only react with the acetic acid presence in the vinegar. The conical flask is swirled gently. The initial colour for the acidic solution is colourless. As the acid solution undergo titration, the colour change from colourless to pale pink colour. The end of titration is indicated when the mixture remains in pale pink colour. The titration process is stopped. The volume of sodium hydroxide needed to neutralise 2.0 ml of vinegar is recorded and final weight of vinegar with conical flask is weighed. The experiment above is repeated twice to get the average reading of volume of sodium hydroxide needed to neutralise the acid solution. All the data is recorded in the table. The experiment procedure above is then repeated using different type of vinegar which is Yeos and Jalen. Burette,  ±0.05 cm3 Different vinegar brands (Jalen, Yeos, Earth Brand) Beaker,  ±0.5 Conical flask , ±0.5 Retort stand and clamp Pipette and ph meter Phenolphathalein Weighing balance ,  ±0.0001 Sodium hydroxide (1.0 molar) Rod and distilled water 2.3 Methodology for rusting process and rust stain removal This experimental procedure is carried out because it is hard to determine the degree of rusting of any random metal. Therefore, I fixed the type of metal use which is iron nails and the time left for iron to rust which is approximately 7 day (1 week) . The materials is ready and apparatus needed is set up. The initial mass of each iron nail is weighed and the data is recorded. The 5 iron nails is marked such as iron nail A, iron nail B and consecutively by using a small piece of paper attached to each nail. Then , a mineral bottle is cut to get the bottom part of mineral bottle and form a cup like. Then, the cup is filled with small amount of tap water. All iron nails is dipped in the water and left to be exposed to air in the laboratory for seven days. After seven days , all iron nails are take out from the bottle. Then, each iron nail which already rusted now is weighed again to get mass of rust with the iron nail. The mass of rust formed on each iron nail is found by subtracted the final weight of iron nail with its initial weigh. Then, the average mass of rust formed is calculated. All the data of the experiment is recorded in a table. The experiment above is repeated twice. The process to remove rust stain is carried out. Vinegar is inserted into a transparent cup. The rusted iron nail is immersed into the cup contained vinegar. The reaction is observed. The time taken for the iron rust to be remove completely by the vinegar from the iron nail is recorded by using stopwatch. The same procedure done to all 5 iron nails . The average time taken needed to remove the rust is calculated. The data and result is tabulated. The experiment above is repeated using different type of vinegars. Apparatus and materials Burette,  ±0.05 cm3 Beaker,  ±0.5 Bottle cup Different vinegar brands (Jalen, Yeos, Earth Brand) Conical flask , ±0.5 Measuring cylinder,  ±0.05 Weighing balance ,  ±0.0001 5 Iron nails Distilled water 3. Data collection and processing 3.1 Data collection and processing for experiment   Quantitative data Type of vinegar brand Weight of empty conical flask (g)  ±0.0001 Weight of 2.0 ml of vinegar with conical flask (g)  ±0.0001 Mass of vinegar  ±0.0002 (g) Earth Brand Qualitative data The initial colour of vinegar and sodium hydroxide is colourless. The colour of vinegar solution remains colourless even after phenolphthalein is added. When the mixture undergo titration process, the mixture remains colourless but when the end point of titration reach, the colour of mixture turns from colourless to pale pink. Equation for the neutralization process = CH3COOH (aq) + NaOH (aq) à ¢Ã¢â‚¬  Ã¢â‚¬â„¢ CH3COONa (aq) + H2O (l) Calculation of percentage by mass of acetic acid in vinegars. 1. Earth Brand Calculate number of moles for NaOH = MV 1000 (32.54 ml of NaOH solution added x 1.0 molar of NaOH) 1000 = 0.03254 moles of NaOH uncertainties =( 0.05/ 32.54) x 100% = 0.15 % CH3COOH (aq) + NaOH (aq) à ¢Ã¢â‚¬  Ã¢â‚¬â„¢ CH3COONa (aq) + H2O (l) From the equation , the acetic acid in vinegar reacts with sodium hydroxide in a 1:1 ratio. 1 mole of acetic acid reacts with 1 mole of sodium hydroxide to for 1 mole of sodium acetate and 1 mole of water. Thus, 0.03254 mole of acetic acid reacts with 0.03254 mole of sodium hydroxide to form 0.03254 mole of sodium acetate and 0.03254 mole of water. Calculate the amount of acetic acid in Earth Brand. Therefore, Molecular mass calculation: 12.0107 + 1.00794*3 + 12.0107 + 15.9994 + 15.9994 + 1.00794 = 60.05196 g/mol To find the mass of acetic acid in vinegar is given by the formula number of mole x molar mass of acetic acid Thus, 0.03254 moles x 60.05196 g/mol = 1.954 g of acetic acid  ± 0.15 % To calculate the percentage by mass of acetic acid in vinegar (Earth Brand): Mass of vinegar use= 2.2837 g uncertainties = (0.0001/2.2837) x 100% = 0.0044 % mass of acetic acid in vinegar = 1.9540 g The percentage by mass of acetic acid =(1.9540/2.2837 ) x 100 = 85.56 % uncertainties = 0.0044 + 0.15 = 0.1544 % Therefore, the percentage by mass of acetic acid in Earth Brand is = 85.56 %  ± 0.15 % The method of calculation of percentage by mass of acetic acid for other vinegars is same with the calculation above. Therefore, the result for the calculation is tabulated. Discussion The 2.0 volume for vinegar used needed to be weighed to find the mass of vinegar as I assumed the density for vinegar is different from density of water. From the result, it shows that different vinegars has different density, therefore different vinegars will have different mass of 2.00 volume used. I also assumed that during neutralisation process, the sodium hydroxide will only reacts with the acetic acid presence in the vinegar. Based on the result , it shows that different type of vinegar brands has different percentage by mass of acetic acid of vinegar of different brands. Jalen has the highest percentage by mass of acetic acid followed by Earth Brand and Yeos. These explained that why different vinegars have different ph value. Acetic acid is weak acid. The higher the percentage by mass of acetic acid, the lower the pH value of the vinegar. Hypothesis for experiment one is accepted. Different type of vinegar has different percentage of acetic acid of vinegar. Thus, experiment two can be conducted. 3.2 Data collection and processing for experiment 2 Quantitative data The iron nail pale brown in colour while the tap water and the vinegar is colourless. When the iron nail is left in the bottle cup, there is no immediate reaction occured. After several hours, a reddish brown substance start to appear around the iron nail. After several days more reddish brown substance deposited around the iron nail like coated it. When the iron is immersed in vinegar inside a cup bottle, bubble formed and the reddish brown substance fall off from the iron nail. The colour of vinegar turned slightly from colourless to pale reddish and the reddish substances settle at the bottom of the cup bottle. Later, it dissolve in the vinegar. 4. Processed result Discussion To put in a simple words, rusting is the corrosion of iron and readily occurs in the metal in the presence of water , oxygen and iron. The formation of a reddish brown substance like which appeared and adheres to the iron nail is called rust. Based on the research, it shows that vinegar could serve as one of the substance that can remove rust stain on metal due to the presence of acid. From the experiment , It clearly shows that different vinegar has different degree of removing the rust stain because due to different percentage by mass of acetic acid in the different type of vinegars. After rusting process occurs on the iron nail, the iron nail weighed more. These is because rust  forms when iron metal is oxidized by oxygen in the presence of water . Iron oxide is another term for rust. Iron oxide as a molecule and consist of three elements which is of iron with oxygen and water. From the result obtained based on the experiment, it shows that the rust form is originally mass from the iron but the mass of oxygen and water comes from the atmosphere. When the rust form on the iron nail, the mass of iron rust increased by the mass of oxygen and water that combined with the iron. Therefore, iron nail weight more after rusting process occurs due to addition of these elements from atmosphere. In the presence of oxygen and water, Reduction half equation: 4e- + 2H2O(l) + O2(g) > 4OH-(aq) The tip or the head component of iron nail is easily oxidised. The crystal lattice of iron is distorted and the iron atoms will be facilely oxidised. Oxidation half equation: 2Fe(s) > 2Fe2+(aq) + 4e- Therefore the overall net equation for the chemical reaction is 2Fe(s) + 2H2O(l) + O2(g) > 2Fe2+(aq) + 4OH-(aq) The process continue. After that, the Fe2+ and OH- ions will move and diffuse through the water. When both ions meet they will react to produce precipitate which iron (II) hydroxide , Fe(OH)2 .These iron (II) hydroxide then will be further oxidise to iron (II) hydroxide, Fe(OH)3 and will be dehydrated to produce rust. Chemical equation for rusting process : 2Fe(s) + 2H2O(l) + O2(g) > 2Fe2+(aq) + 4OH-(aq) Fe2+(aq) + 2OH-(aq) > Fe(OH)2(s) Fe(OH)2(s) + O2 > Fe(OH)3(s) Fe(OH)3(s) dehydrates > Fe2O3.nH2O(s) or rust Therefore, the chemical formula for rust is Fe2O3.nH2O(s) [5] (Loh Wai Leng,Tan Yin Toon,Tan On Tin, 2011, oxidation and reduction) Acetic acid is a weak acid that presence in vinegar. Vinegar works well than other strong acid because the presence of weak acid. Therefore, it will less attack the iron nail itself. Strong acid will corrode both the rust stain and the iron nail. To prevent that, substance with weak acid is preferable. When the iron nail with rust is soaked into the vinegar containing acid, the rust on iron nail will dissolve and loosen. The crumbly hydrated iron oxide will form a soluble salt, in these reaction between acetic acid and iron(III) oxide, it will formed iron acetate. Equation of reaction between acetic acid and rust: 6CH3COOH(l) + Fe2O3 (s) > 2Fe(CH3COO)3 (s) + 3H2O (l) and ferric acetate, Fe(CH3COO)3 is water soluble. However, the hypothesis for my second experiment is rejected. Clearly from the experiment above, it shows there is no directly proportional relationship between percentage of mass of acetic acid in vinegar and rate of removing rust. Jalen has the highest percentage of mass of acetic acid followed by Earth Brand and Yeos but Earth Brand shows the highest rate of removing rust followed by Jalen and Yeos. There, my experiment has limitation which lead to these result. After the experiment, I accidentally left the iron nail that already washed with vinegar in the cup bottle. I found out that the rusting on iron nail occur more faster by the day. I concluded myself that acid actually can remove the rust stain from the nail but in the same time it also promote rusting. The surface of iron nail will clean after the rust stain is remove and let the iron nail exposed to acid. Somehow, acid will react on the surface of iron nail. Further research could be done to investigate the after effect of acid after removing the rust stain. 5. Conclusion This research show that each vinegar has it own percentage by mass of acetic acid in each and every different type of vinegar. From the experiment and calculation, it shows that the percentage by mass of acetic acid in vinegar brands of Earth Brand, yeos and Jalen accordingly is 85.56%, 83.68% and 92.20%. The difference of percentage by mass of acetic acid in vinegar resulted the difference in the vinegar taste and the pH value. The experiment shows that there is not much significant difference of percentage by mass of acetic acid in different type of vinegar brands. The vinegars used in the experiment is the product of Malaysia . Different result may show if I test of the products of other country. These difference of percentage of acetic acid in different type of vinegar, effect the result obtained in experiment two. The hypothesis for experiment one is accepted. These research also shows that vinegar could serve as a potentially rust stain remover but in low degree because acetic acid presence in vinegar is a weak acid. Still, it could be use safely because the acidic concentration is not harmful and vinegar is easy to obtain rather than any other applications. However , from the result obtain, it shows that the higher the percentage of acetic acid in vinegar, does not always cause higher rate of rust stain removal. Jalen has the highest percentage by mass of acetic acid in vinegar followed by Earth Brand and Yeos which is 92.20%, 85.56% and 83.68% respectively. But the experiment shows that the vinegar that has the highest degree of rust stain removal is Earth Brand followed by Jalen and Yeos which is 0.0049gs-1, 0.0044gs-1 and 0.0043gs-1 second respectively. Therefore I could conclude that , Earth Brand is a better rust stain remover Yeos and Jalen , but Jalen is better than yeos. Even though there is no not much significant difference, but it effected the overall result. Therefore, the hypothesis for the second experiment is not accepted. There is several reason why these result obtained. Maybe there is another substance that presence in the vinegar, react with the rust stain on iron nail which can affect the result because I assumed that the rust stain will only react with the acetic acid presence in vinegar. Further research could be conducted to explain and determine the problem. The other reason may cause due to limitation that will be discuss later. However ,these research able to prove that there is difference of percentage by mass of acetic acid in different type of vinegar and vinegar can act as a potentially rust stain remover . But due to weak acid presence in vinegar, vinegar could only remove rust stain that only form only on surface of metal . It cannot remove the rust that has been deeper into metal . Overall, I can conclude from the experiment that different vinegar has different percentage by mass of acetic acid and vinegar is a highly potential rust stain remover. 6. Evaluation Throughout the experiment there are several limitations that can affect the result of the experiment. During the titration process, The colour of acidic solution which is vinegar, will change from colourless to pale pink at the end of titration process. The perception of colour change will affect the result. It is hard to determine what the exact pale pink colour that need to be achieve. In order to overcome this problem, a controlled conical flask containing acid solution when end point of titration which colour is pale pink should be put beside the set up apparatus so that the person would know what exactly pale pink colour they need to reach. pH meter also can be used to fixed the pH value needed. Another problem that could effect the result is when weighing the weight of iron nail after the rust is formed. Rust that is formed for several days only appear on the surface of the iron nail. Therefore, when removing the iron nail to be weighed, the rust from the surface of iron nail could drop. Even a slight drop of rust from the iron nail, could cause the result obtained will not be accurate . Therefore, to overcome these problem, during the formation of rust, the iron nails should be left on the electronic balance. So, the iron nail does not have to be removed and rust will not fall off. The result obtained will be more precise. Another problem that could arise is when removing the rust from iron nail using vinegar. In these experiment, I assumed that, only acetic acid in vinegar will react with the rust on the iron nail. So that my hypothesis could be achieved. But it turn out my hypothesis is invalid. It could be that other substances presence in the vinegar, will react with the rust on the iron nail. After all, vinegar consist more than one substance. these problem can be overcome by doing some further research. Lastly, the after effect of the experiment. Acid can remove rust stain but the chemical reaction between acid and the surface of iron nail, can increase the rate of rusting of iron nail. Corrosion in acid solutions is much more rapid than in neutral solutions, and the latter is more rapid than in alkaline solutions.[6](Frank N. Neller,2004, Corrosion Facts). Therefore to solve the problem, after washed the iron nail to remove the rust, the iron nail need to place in boil water for a while. Therefore, no after chemical reaction will occur. Thus, rusting will not occur.

Karl Marx Essay -- sociology, marx, positivism

Chose one of sociology’s founding â€Å"figures† and critically assess his or her particular contribution. There are many of sociology's founding figures that have extremely well-built ideas, practices and studies that I could explore, but one renowned philosopher stands out amongst the crowd, and that person is named Karl Marx (1818-1883). In this essay I aim to explore and critically assess his ideas, theories, and studies in his contribution to sociology, and if his ideas, theories and studies are useful to this contribution to sociology. Sociology began in the eighteenth and nineteenth centuries in Western Europe. Around this time, the political and economic systems in Europe were changing. Things like the Monarchy, (which was the rule of Kings and Queens) was disappearing, while capitalism was growing rapidly. Different societies began contacting eachother, and the economic markets began developing. Things were most definitely changing, and there was now room for new ideas to bloom. Something that had an enormous impact on the development of sociology was the Enlightenment. ''The Enlightenment was characterised by faith in the ability of human reason to solve society's problems.'' (Chapter 1, Andersen and Taylor , 2008). During the Enlightenment, ideas began to establish themselves and eventually effected sociological studies. Positivism is based on the idea that it is possible to observe social life and establish intricate knowledge about how it works. It says that sociology should only be observed with senses yet the theories of sociology should be observed in a methogical way. Although it does not effect modern sociology, as it does not take into account the fact that some methods do not allow the ideas to be observed... ...3] Boundless. The Marxist Critique of Capitalism. [Online] Available from: https://www.boundless.com/sociology/understanding-economy/economic-systems--2/the-marxist-critique-of-capitalism/ [Accessed on 17 Dec 2013] Chapter XX. Marx K. 1893. Das Kapital. Volume II Progress Publishers. Marx K. 1848. The Communist Manifesto. International Publishing Co. Marx K. 1848. The Victory of the Counter Revolution of Vienna. [Online] November 12th. Available from: http://www.marxists.org/archive/marx/works/1848/11/06.htm [Accessed on 17 Dec 2013] H. 1879. Interview with Karl Marx. [Online] January 5th.. Available from: http://www.marxists.org/archive/marx/bio/media/marx/79_01_05.htm [Accessed on 17 Dec 2013] sociologytwynham. 2013. Marxist views of the Family [Online]. Available from: http://sociologytwynham.com/2013/06/13/marxist/ [Accessed on 17 Dec 2013] Karl Marx Essay -- sociology, marx, positivism Chose one of sociology’s founding â€Å"figures† and critically assess his or her particular contribution. There are many of sociology's founding figures that have extremely well-built ideas, practices and studies that I could explore, but one renowned philosopher stands out amongst the crowd, and that person is named Karl Marx (1818-1883). In this essay I aim to explore and critically assess his ideas, theories, and studies in his contribution to sociology, and if his ideas, theories and studies are useful to this contribution to sociology. Sociology began in the eighteenth and nineteenth centuries in Western Europe. Around this time, the political and economic systems in Europe were changing. Things like the Monarchy, (which was the rule of Kings and Queens) was disappearing, while capitalism was growing rapidly. Different societies began contacting eachother, and the economic markets began developing. Things were most definitely changing, and there was now room for new ideas to bloom. Something that had an enormous impact on the development of sociology was the Enlightenment. ''The Enlightenment was characterised by faith in the ability of human reason to solve society's problems.'' (Chapter 1, Andersen and Taylor , 2008). During the Enlightenment, ideas began to establish themselves and eventually effected sociological studies. Positivism is based on the idea that it is possible to observe social life and establish intricate knowledge about how it works. It says that sociology should only be observed with senses yet the theories of sociology should be observed in a methogical way. Although it does not effect modern sociology, as it does not take into account the fact that some methods do not allow the ideas to be observed... ...3] Boundless. The Marxist Critique of Capitalism. [Online] Available from: https://www.boundless.com/sociology/understanding-economy/economic-systems--2/the-marxist-critique-of-capitalism/ [Accessed on 17 Dec 2013] Chapter XX. Marx K. 1893. Das Kapital. Volume II Progress Publishers. Marx K. 1848. The Communist Manifesto. International Publishing Co. Marx K. 1848. The Victory of the Counter Revolution of Vienna. [Online] November 12th. Available from: http://www.marxists.org/archive/marx/works/1848/11/06.htm [Accessed on 17 Dec 2013] H. 1879. Interview with Karl Marx. [Online] January 5th.. Available from: http://www.marxists.org/archive/marx/bio/media/marx/79_01_05.htm [Accessed on 17 Dec 2013] sociologytwynham. 2013. Marxist views of the Family [Online]. Available from: http://sociologytwynham.com/2013/06/13/marxist/ [Accessed on 17 Dec 2013]

Andy Warhol and His work on the Contemporary Art Essay

Andy Warhol (1928-1987) of Pittsburgh, Pennsylvania, less commonly known as Andrew Warhola, was a central figure in the pop art category. He is an American artist who reigned around the world as a painter, author, avant-garde filmmaker and as a public personage for his connection to many people of different fields of work and status. Warhol studied in Carnegie Institute of Technology (now known as the Carnegie Mellon University) to hone his artistry (www. artgallery. com, 2008). Warhol unify his works through the Keatonesque style which is aritistically and personally affectless. In his work s a Pop artist, conceptual aspects were always there as a key factor. His art was known for its irony, in most of its sense. Campbell’s soup cans was probably his most famous work. The mundane images he made were turned to the so-called ironic art through enlargement, hand-painting or silk-screening. He always mentioned that the idea of his work is always at the surface of his work, obvious, apparent. Other attributes of his work were slight color changes using ink spots (www. pbs. org, 2007). His work reveals contemporary art in such a way it concerns some human desires that never ceases to revolve around. He even made his film where he was an international celebrity and a pop artist. His experiences with many people brought him the ideas of what is contemporary, and made sure that no traces of the artists can be recognized from his artwork.