Ionic Dissociation of Copper(II) Sulfate

Steps:

• The formula of copper(II) sulfate is CuSO₄.
• In aqueous solution, CuSO₄ fully dissociates into Cu²⁺ cations and SO₄²⁻ anions.
• The negative ions are solely the sulfate ions (SO₄²⁻).
• No other anions form from this dissociation.

Why C is correct:

• CuSO₄(aq) dissociates as CuSO₄ → Cu²⁺ + SO₄²⁻, so only sulfate ions are the negative ions present, per the ionic compound dissociation rule.

Why the others are wrong:

• A: Copper(II) ions are positive (cations); hydrogen ions are absent.
• B: Hydroxide ions do not form in neutral CuSO₄ solution.
• D: Hydrogen ions are not produced in this dissociation.

Final answer: C