Question

Select two compounds below that can be used to make a buffer solution. Aacetic acid Bformate ion Csulfite ion Dcarbonate ion Eacetate ion Fhydrogen sulfide

Answer 1

Answer: Two compounds below that can be used to make a buffer solution are acetic acid and acetate ion.

Explanation:

A solution that helps in resisting change in pH when a small amount of acid or base is added to it is called a buffer solution.

A buffer solution consists of a mixture of weak acid and its conjugate base.

Acetic acid has a chemical formula $CH_{3}COOH$ and its conjugate base is $CH_{3}COO^{-}$.

This base is also called acetate ion.

Acetic acid is a weak acid because it dissociates weakly when added to a solvent like water.

Therefore, acetic acid and acetate ion will form a buffer solution.

Thus, we can conclude that two compounds below that can be used to make a buffer solution are acetic acid and acetate ion.