Sodium metal is manufactured by the electrolysis of fused sodium chloride mixed with KCl and KF. On electrolysis At iron cathode. Na++e−→Na(s) (metallic sodium) At grapite anode 2Cl−→Cl2(g)+2e− NaCl melts at 800∘C. It is difficult to attain and maintain its melting point. So, KCl and KF are mixed to lower the melting point of NaCl to about 600∘C. KCl and KF are themselves not electrolysed under the voltage conditions used for sodium.