2.14

a) tapahtuu, Fe\left(s\right)+CuSO_4\left(aq\right)\rightarrow Cu\left(s\right)+FeSO_4\left(aq\right)
b) ei tapahdu
c) tapahtuu, 2\ Sn\left(s\right)+2\ HCl\left(aq\right)\rightarrow2\ SnCl\left(aq\right)+H^2\left(g\right)