Answer:
1. Combine iron and copper (II) sulfate solution. (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. 
H2O → 2H2 + O2 
5. Burning magnesium. 
Mg + O2 → Mg2+O2- 
Step-by-step explanation: