Answer
(e) diagram
Work Step by Step
Sodium sulfate is a completely dissociated salt in aqueous solution, where 1mol of Na₂SO₄ gives 2mol of sodium ions and 1mol of sulfate ions, which is best described in diagram (e).
Na₂SO₄ (aq) →2Na⁺ (aq) + SO₄²⁻ (aq)