Question

In 2-3 sentences, describe how propanoic acid (C2H5COOH) and propanoate anion (C2H5COO-) can be used to make a buffer solution if the Ka of propanoic acid is 1.34 x 10-5.

Answer 1

Here is what you need to know. Use this information to make your sentences.

The Henderson-Hasselbalch equation is
pH = pKa + log (base)/(acid)
Knowing what pH you want and the pKa of the acid, calculate (base) and (acid) you need to prepare the pH you want. base is propanoate. acid is propanoic acid.