1. Calculate the ratio of [CH:COOHJ/NaCH:COO] to give a buffer solution at pH 5. (Ka of acetic acid 1.8 x 10) 2. What is the pH of the solution of 35 mL 0.20 M formic acid and 55mL 0.10 M sodium formate in 110 mL water? (pKa formic acid=3.75)

1. Calculate the ratio of [CH:COOHJ/NaCH:COO] to give a buffer solution at pH 5. (Ka of acetic acid 1.8 x 10) 2. What is the pH of the solution of 35 mL 0.20 M formic acid and 55mL 0.10 M sodium formate in 110 mL water? (pKa formic acid=3.75)

Chemistry: Principles and Practice

3rd Edition

ISBN:9780534420123

Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Chapter16: Reactions Between Acids And Bases

Section: Chapter Questions

Problem 16.38QE

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Concept explainers

Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.

Question

Solve item 1 using henderson-hasselbach equation.

1. Calculate the ratio of [CH:COOH/NACH:COO] to give a buffer solution at pH 5. (Ka of acetic acid = 1.8 x 10)
2. What is the pH of the solution of 35 mL 0.20 M formic acid and 55mL 0.10 M sodium formate in 110 mL water? (pKa
formic acid=3.75)
3. How many grams of ammonia should be added to 500mL of IM ammonium chloride to give a pH 9? (Ka of
ammonium=5.6x101o)

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