Explain the following types of chemical reactions giving two examples for each of them.
(a) Displacement reaction
(b) Double decomposition reaction
Explain the following types of chemical reactions giving two examples for each of them.
(a) Displacement reaction
(b) Double decomposition reaction
(a) A displacement reaction is a reaction in which a more active element displaces a less active element from a compound.
AB + C→CB + A
e.g. (i) Zinc displaces copper from copper sulphate solution.
Zn + CuSO4 (aq) → ZnSO4 (aq) + Cu
(ii) Iron piece when added to copper sulphate solution, copper is displaced.
Fe + CuSO4 → FeSO4 + Cu
(d) A double displacement reaction is a chemical reaction in which two compounds in their aqueous state exchange their ions to form new compounds.
AB+CD→CB+AD
e.g (i) AgNO3 + HCl ⟶ AgCl + HNO3 (aq)
(ii) NaOH(aq)+ HCl(aq)⟶ NaCl(aq) + H2O
(a) A displacement reaction is a reaction in which a more active element displaces a less active element from a compound.
AB + C→CB + A
e.g. (i) Zinc displaces copper from copper sulphate solution.
Zn + CuSO4 (aq) → ZnSO4 (aq) + Cu
(ii) Iron piece when added to copper sulphate solution, copper is displaced.
Fe + CuSO4 → FeSO4 + Cu
(d) A double displacement reaction is a chemical reaction in which two compounds in their aqueous state exchange their ions to form new compounds.
AB+CD→CB+AD
e.g (i) AgNO3 + HCl ⟶ AgCl + HNO3 (aq)
(ii) NaOH(aq)+ HCl(aq)⟶ NaCl(aq) + H2O
