Question

5. What happens when :
a) Zn metal is added to copper sulphate solution.
b) Aluminium metal is added to dilute HCI​

Answer 1

Answer:

a CuSO4 + Zn ------- ZnSO4 +Cu

b HCl + Al -------- AlCl2 + H

Answer 2

Answer:

(a) Zn (s) + CuSO₄ (aq) ---------------> ZnSO₄ (aq) + Cu

(b) 2Al (s) + 6HCl (aq) ----------> 2AlCl₃ + 3H₂

Explanation:

(a) When Zinc is added to copper Sulphate solution, being more reactive than copper, it displaces copper from its salt solution to form zinc sulphate and copper. The balanced chemical equation representing the above chemical change is s below:

Zn (s) + CuSO₄ (aq) ---------------> ZnSO₄ (aq) + Cu

(b) When Aluminium is added to HCl, it displaced Hydrogen from HCl and forms Aluminium Chloride and Hydrogen gas. The balanced chemical equation representing this chemical change is as below:

2Al (s) + 6HCl (aq) ----------> 2AlCl₃ + 3H₂