(a) Suppose you have two stock solutions 0.50 M CH3COOH and 0.50 M CH3COONa. Is these were mixed together would this be a buffer? How many milliliters of sodium acetate do you need to add to obtain a pH of 5.45 if you start with 100 mL of acetic acid? Ka = 1.8 X 10-5

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Nestor RutherfordLv2

15 Feb 2019

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(a) Suppose you have two stock solutions 0.50 M CH3COOH and 0.50 M CH3COONa. Is these were mixed together would this be a buffer? (B)How many milliliters of sodium acetate do you need to add to obtain a pH of 5.45 if you start with 100 mL of acetic acid?

You need to prepare a solution with pH = 4.50. You have the following 0.15 M solutions available in the laboratory: CH₃COOH, CH₃COONa.How many milliliters of each solution would you use to make one liter of this buffer solution?

K_a acetic acid = 1.8

amberprairie-dog239

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?