Potentiometric Titration Of Acetic Acid Lab Report
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Experiment #5: Potentiometric Titration Calculations of Acetic Acid,
Phosphoric Acid and Solid Unknown Acid with Sodium Hydroxide
Name: Raisinelle Consignado
Partner: Angela Matias
10/27/2015
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Table of Contents:
Introduction 3
Titration Curve of HC2H3O2 4
Titration Curve of H3PO4 5
Titration Curve of Unknown solid acid (H2A) 6
Calculations for HC2H3O2 7-9
Calculations for H3PO4 10-13
Calculations for H2A 14-17
Summary Table of Ka and pKa value 18-19
Discussions 20-21
Original Raw Data
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Introduction:
In this experiment, various acids such as acetic acid (HC2H3O2), phosphoric acid (H3PO4) and a given sample of unknown solid acid (H2A) will be separately titrated with a certain concentration and volume of Sodium Hydroxide
(NaOH). The specific objective of this experiment is to calculate the precise molarity, calculate the value of Ka, pKa, and percent error of each acid and to determine the unknown solid acid by analyzing the equivalence point for each titration using a titration curve. Three separate titration curve graphs will be generated based on the measured data collected including the pH of the solution while changing rapidly and the volume of NaOH added in each solution. The equivalence point will provide precise volume and concentration measurements that will be needed to accurately calculate the value of Ka, pKa and percent error.
See (Experiment 1B-5 lab handout) for step-by-step procedures and (Alternative procedure for part 4) posted on canvas.
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