Balance the following ionic equations by ion-electron method and write the next equation
1. Cu + 2H+ Cu2+ + H2
2. Cu + 2Ag+ Cu2+ + 2Ag
3. Cu2+ + 2Cl– Cu + Cl2
4. PbCl2 + Al AlCl3 + Pb
5. Cl2 (aq) + Br– (aq) Br2(aq) + Cl– (aq)
6. Fe (s) + Ag+(aq) Ag (s) + Fe2+ (aq)
7. Pb2+(aq) + Mg (s) Mg2+ (aq) + Pb (s)
8. Al (s) + Fe 2+ (aq) Al3+(aq) + Fe (s)
9. NO3– (aq) + AsO3– 3(aq) NO(g) + AsO4– 3(aq)
10. Cu(s) + NO3– (aq) Cu++(aq) + NO(g)
11. NO2(g) + H2(g) NH3(g) + H+
12. Cr2O72−(aq) + NO2– (aq) Cr3+(aq) + NO3−(aq)
13. Cr +3(s) + ClO3−( aq) CrO42−(aq) + Cl−(aq)