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Electrolysis is the process in which electrical energy is converted to chemical energy. In electrolyte cell, oxidation takes place at anode and reduction at cathode. Electrode process depends on the electrode taken for electrolysis. Amount of substance liberated at an electrode is directly proportionation to the amount of charge passed through it. The mass of substance liberated at electrode is calculate using the following realation : m=(itE)/(96500) Here, E represent the equivalent mass and 96500 C is called the faraday constant. Faraday (96500 C) is the charge of 1 mole electron i.e., 6.023 xx 10^(23) electrons, it is used to liberate ongram equivalent of the substance. The passage of current liberates H_2 at cathode and Cl_2 at anode. The solution is

Answer»

copper chloride in water
NaCl in water
mercuric chloride in water
`AuCl_3` in water

SOLUTION :`NaCl to NA^+ +Cl^(-)`
Anode : `2Cl^(-)to Cl_2 +2e^(-)`
CATHODE : `2H^(+) + 2e^(-) to H_2`


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