1. What is the pH of a solution that results from adding 400 mL of 0.40 M NaOH to 600 mL of 0.50 M HF? (Ka of HF = 7.2 x 10-4)

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 27QRT: If added to 1 L of 0.20-M NaOH, which of these would form a buffer? (a) 0.10 mol acetic acid (b)...
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1. What is the pH of a solution that results from adding 400 mL of 0.40 M NaOH to 600 mL of 0.50 M HF? (Ka of HF = 7.2 x 10-4)

2.A buffer is prepared by combining 170 mL of 0.50 M NaOH and 330 mL of a 0.75 M weak acid, HA. If the pH of the buffer is 5.90, what is the Ka of the acid?   

 

 

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