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An analytical chemist is titrating 110.9 mL of a 1.100M solution of nitrous acid (HNO₂) with a 0.3900M solution of NaOH. The pK of nitrous acid is 3.35. Calculate the pH of the acid solution after the chemist has added 83.04 mL of the NaOH solution to it. Note for advanced students: you may assume the final volume equals the initial volume of the solution plus the volume of NaOH solution added. Round your answer to 2 decimal places.

An analytical chemist is titrating 110.9 mL of a 1.100M solution of nitrous acid (HNO₂) with a 0.3900M solution of NaOH. The pK of nitrous acid is 3.35. Calculate the pH of the acid solution after the chemist has added 83.04 mL of the NaOH solution to it. Note for advanced students: you may assume the final volume equals the initial volume of the solution plus the volume of NaOH solution added. Round your answer to 2 decimal places.

Chemistry
Chemistry
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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An analytical chemist is titrating 110.9 mL of a 1.100 M solution of nitrous acid (HNO₂) with a 0.3900 M solution of NaOH. The pKₐ of nitrous acid is 3.35. Calculate the pH of the acid solution after the chemist has added 83.04 mL of the NaOH solution to it. *Note for advanced students:* you may assume the final volume equals the initial volume of the solution plus the volume of NaOH solution added. Round your answer to 2 decimal places. pH = [Input box] There are no graphs or diagrams included.
Transcribed Image Text:An analytical chemist is titrating 110.9 mL of a 1.100 M solution of nitrous acid (HNO₂) with a 0.3900 M solution of NaOH. The pKₐ of nitrous acid is 3.35. Calculate the pH of the acid solution after the chemist has added 83.04 mL of the NaOH solution to it. *Note for advanced students:* you may assume the final volume equals the initial volume of the solution plus the volume of NaOH solution added. Round your answer to 2 decimal places. pH = [Input box] There are no graphs or diagrams included.
Expert Solution
Step 1

First we need to calculate moles of both HNO2 and NaOH. 

Then we have to draw an ICE table for reaction between them to calculate equilibrium moles. 

Then using Henderson Hasselbalch equation we can calculate pH. 

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