Compare the electrolysis of molten potassium chloride and solution of potassium chloride. What are the pro cesses taking place at the cathode and the anode?

Explanation

Electrolysis of molten potassium chloride
when electricity passed through molten potassium chloride, it decomposes to form `K^+` and `Cl^-` ions.
`KCl rarr K^+ + Cl^-`
Chemical reaction occured in cathode
`K^+` ion reach the negative electrod, receive two electrons and changed as potassium atoms.
`K^+ + e^- rarr K`
Chemical reaction occured in anode
`Cl^-` become `Cl_2` by losing one electron.
`Cl^- - e^- rarr Cl`
`Cl + Cl rarr Cl_2`
Electrolysis of KCI solution
KCI decomposes by the passage of electricity.
`KCl rarr k^+ + Cl^-`
`H_2 O rarr H^+ + OH^-`
`K^+ and H^+` move towards cathod and `Cl^- and OH^-` towards anode. Between `K^+and H^+`, `H^+` has a greater reduction tendency.Between `Cl^- and OH^-, Cl^- has greater oxidation tendency .
Chemical reaction at the cathode
`H^+ + e^+ rarr H`
`H + H rarr H_2`
Chemical reaction at the anode
`Cl^- - e^- rarr Cl`
`Cl + Cl rarr Cl_2`