what is chlor-alkali process? write the chemical reaction taking place in the form of chemical equation.. what are the gases liberated at the anode and cathode respectively.

It is a type of decomposition reaction.
When electricity is passed through an aqueous solution of sodium chloride (called brine), it decomposes to form sodium hydroxide. The process is called the chlor-alkali process because of the products formed- chlor for chlorine and alkali for sodium hydroxide. Following is the chemical equation for the process

 2NaCl (aq) + 2H2O (l) → 2NaOH (aq) + Cl2 (g) + H2 (g) 

Chlorine gas is liberated at the anode while hydrogen gas is liberated at the cathode.

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A Chloralkali process always implies the electrolysis of common salt or sodium chloride. 
 
The chloralkali process
2NaCl + 2H2
O —> 2NaOH + Cl2
 + H2
Economics of equal masses of NaOH and Cl2
 being produced;
reintroduction of soda ash process for NaOH
Electrolysis: Anode reaction
Cl!
(aq) —> ½Cl2
 + e!
at a graphite anode (old
style cells) or Ti/IrO2
(newer cells)
Cathode reaction: old style mercury cell
Na+
(aq) + e!
 —> Na/Hg
Na/Hg + H2
O —> NaOH + ½ H2
is it right
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i cannot understand it is there any other way.

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