Lab writeup - Acids and the Environment Part II:...

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Acids and the Environment Part II: Determining Molarity Tom Lee SID: 21846711 Chemistry 1A Section 620 GSI: Will Hudson 23 September 2010
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The overall goal of this titration experiment was to determine the concentration of the unknown acidic solution, acid B. I first prepared known basic solution and the unknown acidic solution, in which indicator was added. Using a 25 mL buret that contains the diluted basic solution, I titrated the unknown solution. The amount of basic solution that was added was recorded when the titration reached the end-point, at which the solution was green. As a result of the titration experiment, I calculated that the concentration of unknown acid B solution was 0.3182 M. Introduction The titration experiment is performed to determine the concentration of unknown chemicals. When the titration reaches the equivalence point, at which the solution is neutral, the indicator will change color. And by using the chemical amount of known base added, the concentration of the unknown solution can be calculated. In this experiment, the more concentrated the unknown solution, the more acidic it is. Once the concentration is known and the solution is identified, the pH of the solution can be calculated. This technique is useful to predict new pH of solutions, when changes in concentration are known. For example, we can predict the change in pH of a lake if we know the concentration of carbon dioxide in it at some point in time and how much the concentration may increase in the future.
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This note was uploaded on 04/07/2012 for the course CHEM 1A taught by Professor Nitsche during the Spring '08 term at University of California, Berkeley.

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Lab writeup - Acids and the Environment Part II:...

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