Task 5.1a

Show if the change in the oxidation numbers in the reactions below matches the stoichiometry.
Cu²⁺(aq) + Zn(s) = Cu(s) + Zn²⁺(aq)
Ag⁺(aq) + Cu(s) ----> Ag(s) + Cu⁺²(aq)
Zn + H₂SO₄ --> ZnSO₄ +H₂
2MnO₄^- + 16H⁺ + 5C₂O₄^2- ---> 2Mn²⁺ + 8H₂O + 10CO₂
2S₂O₃^2- + I₂ = 2I^- + S₄O₆^2-
2Cu²⁺ + 4I^- -->  2CuI +I₂
IO₃^- + 5I^-  + 6H⁺---> 3I₂ + 3H₂O
4H⁺(aq) + O₂(g) + 2Fe(s) => 2Fe²⁺(aq) +2H₂O(l)
2PbSO₄(s) + 2H₂O(l) ----> Pb(s) + PbO₂(s) + 4H⁺(aq) + 2SO₄^2-(aq)
5K₂SO₃ + 2KMnO₄ +3H₂SO₄ --> 6K₂SO₄ +2MnSO₄ + 3H₂O