Question

Red sclae residue ( COPPER II ) partly dissolves in dilute acid to form a pale blue solution. Name the pale blue solution and give chemical equation to support your answer

Answer 1

The dilute acid we're talking about here is H2SO4. So the reactants involved are Cu and H2SO4.
The product of this reaction is CuSO4·5H2O. This is the pale blue solution.

Answer 2

Thank you sir.. You made my day :D

Answer 3

Is Cu + 2H2So4 = Cuso4 + 2so2 + 2h20