A biochemist needs 750 mL of an acetic acid–sodiumacetate buffer with pH 4.50. Solid sodium acetate(CH3COONa) and glacial acetic acid (CH3COOH) areavailable. Glacial acetic acid is 99% CH3COOH by massand has a density of 1.05 g/mL. If the buffer is to be 0.15 Min CH3COOH, how many grams of CH3COONa and howmany milliliters of glacial acetic acid must be used?

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 116QRT: You want to prepare a pH 4.50 buffer using sodium acetate and glacial acetic acid. You have on hand...
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A biochemist needs 750 mL of an acetic acid–sodium
acetate buffer with pH 4.50. Solid sodium acetate
(CH3COONa) and glacial acetic acid (CH3COOH) are
available. Glacial acetic acid is 99% CH3COOH by mass
and has a density of 1.05 g/mL. If the buffer is to be 0.15 M
in CH3COOH, how many grams of CH3COONa and how
many milliliters of glacial acetic acid must be used?

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