Dissociation of ionic compounds in water

Steps:

• Copper(II) sulfate formula is CuSO₄, an ionic compound.
• In aqueous solution, it fully dissociates: CuSO₄(s) → Cu²⁺(aq) + SO₄²⁻(aq).
• Negative ions (anions) are only SO₄²⁻ from the sulfate group.
• No reaction produces additional anions like OH⁻ or H⁺ in neutral solution.

Why C is correct:

• CuSO₄ dissociates completely into Cu²⁺ cations and SO₄²⁻ anions per the ionic dissociation law for soluble salts.

Why the others are wrong:

• A: Copper(II) ions are cations (positive); H⁺ ions absent in neutral CuSO₄ solution.
• B: OH⁻ ions absent; CuSO₄ is a neutral salt, not basic.
• D: H⁺ ions absent; solution is neutral, not acidic.

Final answer: C