elopezhilario4806 elopezhilario4806

07-04-2019
Chemistry

contestada

What is the ph of a solution that is .75 m in sodium acetate and .50 m in acetic acid? (ka for acetic acid is 1.8*10^-5?

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superman1987 superman1987

20-04-2019

Answer:

4.921.

Explanation:

It is an acidic buffer solution;

∵ pH = pKa + log[salt]/[acid].

∴ pH = - log(1,8 x 10⁻⁵) + log[0.75/0.50] = 4.745 + 0.1761 = 4.921.

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