Predict the products of electrolysis in each of the following:
$i$. An aqueous solution of $AgNO_3$ with silver electrodes
$ii$. An aqueous solution of $AgNO_3$ with platinum electrodes
$iii$. $A$ dilute solution of $H_2SO_4$ with platinum electrodes
$iv$. An aqueous solution of $CuCl_2$ with platinum electrodes.

$i$. At the cathode,$Ag^+$ ions are reduced to $Ag_{(s)}$. At the anode,$Ag$ electrode is oxidized to $Ag^+_{(aq)}$.
$ii$. At the cathode,$Ag^+$ ions are reduced to $Ag_{(s)}$. At the anode,$H_2O$ is oxidized to $O_{2_{(g)}}$.
$iii$. At the cathode,$H^+$ ions are reduced to $H_{2_{(g)}}$. At the anode,$H_2O$ is oxidized to $O_{2_{(g)}}$.
$iv$. At the cathode,$Cu^{2+}$ ions are reduced to $Cu_{(s)}$. At the anode,$Cl^-$ ions are oxidized to $Cl_{2_{(g)}}$.