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What ratio of NaCN to HCN is needed to prepare a pH 9.70 buffer? (Ka of HCN is 4.9 × 10-1⁰)

What ratio of NaCN to HCN is needed to prepare a pH 9.70 buffer? (Ka of HCN is 4.9 × 10-1⁰)

Chemistry: The Molecular Science
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
Section: Chapter Questions
Problem 28QRT: Calculate the pH change when 10.0 mL of 0.100-M NaOH is added to 90.0 mL pure water, and compare the...
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What ratio of NaCN to HCN is needed to prepare a pH 9.70 buffer? (Ka of HCN is 4.9 × 10-1⁰)
Transcribed Image Text:What ratio of NaCN to HCN is needed to prepare a pH 9.70 buffer? (Ka of HCN is 4.9 × 10-1⁰)
What is the pH of a 1.0 L buffer made with 0.300 mol of HF (Ka = 6.8 x 104) and 0.200 mol of NaF to which 0.120 mol of NaOH were added?
Transcribed Image Text:What is the pH of a 1.0 L buffer made with 0.300 mol of HF (Ka = 6.8 x 104) and 0.200 mol of NaF to which 0.120 mol of NaOH were added?
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