Question

Both HC₂O₄⁻ and HS⁻ are amphoteric.

a. Write an equation to show how HC₂O₄⁻ can act as a base with HS⁻ acting as an acid.
b. Write an equation to show how HC₂O₄⁻ can act as a acid with HS⁻ acting as an base.

Answer 1

HC₂O₄⁻ can act as a base with HS⁻ as an acid. It can also act as an acid with HS⁻ as a base.

Step-by-step explanation:

Both HC₂O₄⁻ and HS⁻ are amphoteric, meaning they can act as both acids and bases depending on the reaction.

a. When HC₂O₄⁻ acts as a base, it accepts a proton (H+) from HS⁻, which acts as an acid. The equation for this reaction is: HC₂O₄⁻ + HS⁻ → C₂O₄²⁻ + H₂S.

b. When HC₂O₄⁻ acts as an acid, it donates a proton (H+) to HS⁻, which acts as a base. The equation for this reaction is: HC₂O₄⁻ + HS⁻ → H₂C₂O₄ + S²⁻.