What is the formula for Cu2+ and SO4 2-?

When copper ions (Cu2+) combine with sulfate ions (SO4²⁻), they form copper sulfate with the formula CuSO4.

This is a classic ionic compound formation. The copper ion carries a +2 charge (Cu²⁺), while the sulfate ion carries a -2 charge (SO₄²⁻). Since the charges are equal and opposite, they combine in a 1:1 ratio, creating a neutral compound. The positive and negative charges balance perfectly, resulting in the stable compound CuSO4.

Important Notes:

• Cu²⁺ (copper ion) + SO₄²⁻ (sulfate ion) = CuSO4
• Charges balance: (+2) + (-2) = 0
• Forms an electrically neutral ionic compound
• The subscript "1" is implied and not written