A buffer contains 0.035 mol of boric acid (pKa = 9.15) and 0.015 mol of sodium borate per liter. (a) Calculate the pH of the buffer. (b) Calculate the pH when 2.5 mL of 0.50 M HCl is added to 0.5 L of the buffer.
A buffer contains 0.035 mol of boric acid (pKa = 9.15) and 0.015 mol of sodium borate per liter. (a) Calculate the pH of the buffer. (b) Calculate the pH when 2.5 mL of 0.50 M HCl is added to 0.5 L of the buffer.
Chemistry: Principles and Reactions
8th Edition
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:William L. Masterton, Cecile N. Hurley
Chapter15: Complex Ion And Precipitation Equilibria
Section: Chapter Questions
Problem 11QAP: A buffer is prepared by dissolving 0.0250 mol of sodium nitrite, NaNO2, in 250.0 mL of 0.0410 M...
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A buffer contains 0.035 mol of boric acid (pKa = 9.15) and 0.015 mol of sodium borate per liter.
(a) Calculate the pH of the buffer.
(b) Calculate the pH when 2.5 mL of 0.50 M HCl is added to 0.5 L of the buffer.
(c) Calculate the pH when 2.5 mL of 0.50 M HCl is added to 0.5 L of pure water.
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What about Part C?
Additionally for part B I'm not really getting the bottom of the 2nd page where have the
Wouldn't it be better to set
9.15 + log((7.5mM - 1.25mM)/17.5)?
So don't need to know equation?
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