Utilizing Henderson-Hasselbach Equation, how to solve the given equation below? With the pKa value of 3.75. Compute the pH of a solution containing 0.171 M formic acid and 0.53 M sodium formate.

Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter15: Additional Aqueous Equilibria
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Utilizing Henderson-Hasselbach Equation, how to solve the given equation below?

With the pKa value of 3.75. Compute the pH of a solution containing 0.171 M formic acid and 0.53 M sodium formate. 

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thank you, I would like to have a follow-up question.  Would you get an answer of 4.05 pH if the value of your formic acid is 0.050 M while your sodium formate is 0.10 M? and still the same pKa which is 3.75? 

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