Question

If a strip of aluminum with scratched clean surface is dipped into an aqueous solution of copper sulphate for little time, the surface of the strip becomes brownish. What is the reason for this? Write the balanced chemical equation for the reaction.

Answer 1

When aluminum is dipped in the solution of cupper sulphate then aluminum displaces copper from copper sulphate solution because aluminum is more reactive than copper. Therefore, the surface of the strip becomes brownish.

Answer 2

Answer:

Explanation:

when a strip of aluminium dipped into a solution of copper sulphate it will displace copper and form aluminium sulphate .Copper will deposit on the surface of aluminium strip so that it will become brownish.

3 CU so4+2Al --->Al2(so4)3 + 3Cu