Answer:
1. Combine iron and copper (II) sulfate solution. Â (Hint: Iron will form the iron (III) ion)
Fe + CuSO4 → FeSO4 + Cu
2. Combine lead (II) nitrate and potassium iodide solutions.
Pb(NO3)2+ Kl →  Pbl2 + 2KNO3
3. Combine magnesium metal and hydrochloric acid solution.
Mg + HCl → MgCl2 + H2
4. Electrolysis (splitting) of water. Â
H2O → 2H2 + O2
5. Burning magnesium.
Mg + O2 → Mg2+O2-
Explanation: