Question

What happens when a piece of aluminum metal is added to blue coloured copper sulphate solution?

Answer 1

solution becomes colourless

as Al  is higher than Cu in activity series of metals, so it displaces Cu from its salt solution, and hence the blue colour of copper sulphate fades away

Answer 2

Answer:

3CuSO4.5H2O + 2Al -------> Al2(SO4)3.6H2O + 3Cu

Explanation:

• Aluminium is more reactive than copper so it displaces copper from its salt solution.
• The blue colour of copper sulphate disappears.
• The solution becomes colourless.