Question

Write the acidic equilibrium equation for HPO₄²⁻.

A. HPO₄²⁻ ⇌ H⁺ + PO₄³⁻
B. H₂PO₄⁻ ⇌ H⁺ + HPO₄²⁻
C. HPO₄²⁻ ⇌ 2H⁺ + PO₄⁻
D. H₃PO₄ ⇌ H⁺ + H₂PO₄⁻

Answer 1

The acidic equilibrium equation for HPO₄²⁻ is H₂PO₄⁻ ⇌ H⁺ + HPO₄²⁻.

Step-by-step explanation:

The correct acidic equilibrium equation for HPO₄²⁻ is option B: H₂PO₄⁻ ⇌ H⁺ + HPO₄²⁻. In this equation, H₂PO₄⁻ acts as a weak acid by donating a proton (H⁺) to form HPO₄²⁻.