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Weak Acids and Buffer Solutions

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1. Choose an appropriate weak acid from the list below to make 0.25 liter of a 0.1M buffer solution that has a pH of 4.7:

AVAILABLE WEAK ACIDS:

Acetic acid (Ka = 1.8 x 10⁻⁵)
Citric acid (Ka = 8.4 x 10⁻⁴)
Benzoic acid (Ka = 6.4 x 10⁻⁵)

Use the Henderson-Hasselbalch equation and insert values of pH = 7.4 and the Ka of your selected acid.

Why did you choose this acid?

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Solution Summary

This solution explains how to choose the correct weak acid to make a buffer solution.

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