Question

What happens when a piece of (a) zinc moal is added to copper sulphate solution.
(b) aluminium metal is added to dilute hydrochloric acid? c) silver metal is added to copper​

Answer 1

Explanation:

As Zinc is more reactive than copper, zinc displaces copper from copper sulphate & forms zinc sulphate solution. This is indicated by colour change from blue to colourless. CuSO4 solution has a blue colour while ZnSO4 solution is colourless. Zn(s) + CuSO4(aq) -> Cu(s) + ZnSO4 (aq)

Answer 2

Explanation:

1.As Zinc is more reactive than copper, zinc displaces copper i8

from copper sulphate & forms zinc sulphate solution. This is indicated by colour change from blue to colourless. CuSO4 solution has a blue colour while ZnSO4 solution is colourless. Zn(s) + CuSO4(aq) -> Cu(s) + ZnSO4 (aq)

2.

Blue colour of copper sulphate solution gets disappears. Reason Aluminium reacts with dilute hydrochloric acid to form aluminium chloride and hydrogen gas. ... Reason Silver metal is less reactive than copper, therefore, it cannot displace copper from copper sulphate solution.