* Hydrolysis: When sodium sulfate dissolves in water, it dissociates into sodium ions (Na⁺) and sulfate ions (SO₄²⁻). Neither of these ions undergoes hydrolysis (reaction with water to produce H⁺ or OH⁻ ions).

* Strong Acid & Strong Base: Sodium sulfate is formed from the reaction of a strong acid (sulfuric acid, H₂SO₄) and a strong base (sodium hydroxide, NaOH). The reaction of strong acids and strong bases produces neutral salts.

Therefore, the pH of a sodium sulfate solution is approximately 7, which is neutral.