Question

What happens when a piece of
a) Zinc metal is added to copper sulphate solution?
b) Aluminium metal added to dilute hydrochloric acid?
c) Silver metal is added to copper sulphate solution
Also, write the balanced chemical equation if the reaction occurs.​

Answer 1

(a)    When zinc metal is added to copper sulphate solution, the colour of CuSO4 solution disappears and colourless zinc sulphate solution is formed. Solid brown copper is deposited as it displaces by Zn.

Zn + CuSO4---------> ZnSO4 + Cu

(b) Aluminium displaces hydrogen from HCl and hydrogen gas is evolved with soluble aluminium chloride.

2Al + 6HCl ---------->  2AlCl3 + 3H2

(c) Silver is a Nobel metal and does not exhibit any reaction with copper sulphate.