Experiment 19 - Lab Report

Experiment 19 - Lab Report - William Seo Experiment 19:...

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William Seo Experiment 19: Exploring Buffers and Buffer Capacity CHEM 1212k- A02 February 21, 2012 I did not share this lab report with anyone after lab was finished.
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I. Data/Results Part A: Acetic Acid/Sodium Acetate Buffer Assigned pH Mass of NaCH 3 COO 3H 2 O Measured pH 5.20 3.875g 5.16 Sample Calculations: Equations: 1) Strong acid 2) Strong base Procedure for buffer: 1) In order to see if the buffer will perform correctly, separate 100mL of the buffer and calculate the pH assuming 1mL of 0.5M NaOH is added to the buffer. 2) Add 1mL of 0.5M NaOH to the buffer solution and measure the pH—if the measured pH is close to the calculated pH, then the buffer solution is working properly. The pH of the measured pH should be slightly higher than the initial pH of the buffer solution because we are adding a strong base to the buffer. Sample Calculations: Procedure for deionized water: 1) In order to test this control of deionized water, place 100 mL of deionized water into a beaker. 2) Add 0.6 mL of 0.5M NaOH to the 100 mL of deionized water. Because deionized water is not a buffer solution, even a small amount of a strong base should sharply increase the pH of the newly-created solution. Calculate what the pH of the solution should be after
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adding the strong base and then compare it to actual results by using a pH meter to measure the pH of the solution. Sample calculations:
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This note was uploaded on 02/26/2012 for the course CHBE 2100 taught by Professor Staff during the Spring '08 term at Georgia Institute of Technology.

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Experiment 19 - Lab Report - William Seo Experiment 19:...

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