Make equations by the substitution reaction.

Examples of substitution reactions:
1. Fe + CuSO4 = FeSO4 + Cu;
2. Zn + PbCl2 = ZnCl2 + Pb;
3. Cu + Hg (NO3) 2 = Hg + Cu (NO3) 2;
In a series of voltages, active metals, which stand before hydrogen, displace less active metals from salt solutions.
4. Ca + 2HCl = CaCl2 + H2;
5. 2Na + 2H2O = 2NaOH + H2;
All metals prior to hydrogen in the Stress Row displace hydrogen from acids.
6. 2Al + Fe2O3 = 2Fe + Al2O3 – aluminothermy, used in metallurgy.
Aluminum displaces iron from oxide.