Solve item 3 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? (pKaformic acid=3.75)3. How many grams of ammonia should be added to 500mL of IM ammonium chloride to give a pH 9? (Ka ofammonium=5.6x101o)

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ny grams of a

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10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

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Concept explainers

Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".

Question

Solve item 3 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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