Question

02 what is chloro-alkali process? How sodium hydroxide is produced by this process?​

Answer 1

Explanation:

Passing electricity through brine solution (an aqueous solution of sodium chloride), it decomposes to give chlorine and sodium hydroxide.

The process is termed as the chlor-alkali process. The term chlor for chlorine and alkali for sodium hydroxide.

Chlorine gas is given off at the anode,

Hydrogen gas is given off at the cathode.

Sodium hydroxide solution is formed near the cathode.

The reaction that takes place is as follows:

Answer 2

$\large{\underline{\underline{\red{\tt{\purple{\leadsto }Chlor\:-\:Alkali \:\:Process:-}}}}}$

NaCl ( Sodium chloride ) is used as a raw material for chemicals .

Sodium hydroxide , chorine gas , hydrogen gas is produced by electrolysis of concentrated aqueous solution of sodium chloride ( brine ) .

$\boxed{\red{ \sf \underset{\blue{Sodium\: chloride}}{2NaCl\:(aq)}+\underset{\blue{Water}}{H_2O}\xrightarrow{\green{Electrolysis}} \underset{\blue{Sodium\;hydroxide}}{NaOH} + \underset{\blue{Chlorine}}{Cl_2}+\underset{\blue{Hydrogen}}{H_2}}}$

During electrolysis chlorine gas is produced at anode why hydrogen gas is produced at cathode. Sodium hydroxide solution is produced near the cathode .

This process of electrolysis of sodium chloride solution is called chlor- alkali process because of the products formed chlor for chlorine and alkali for sodium hydroxide.

[ For figure refer to attachment ]

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$\large{\underline{\underline{\red{\tt{\purple{\leadsto }More\:\:To \:\:Know:-}}}}}$

The products formed by Electrolysis of brine is used for :-

$\red{\bullet}\green{ \tt Chlorine (Cl_2)}$

• Used in swimming pool.
• Used in water treatment.
• Used for making PVC .
• Used in making pesticides .
• Used for making disinfectants.

$\red{\bullet}\green{\tt Hydrogen (H_2) }$

• Used as fuel.
• Used for margarine.
• Used for making Ammonia for fertilizers.

$\red{\bullet}\green{\tt Sodium\:hydroxide ( NaOH) }$

• Used for de - greasing metals.
• Used for making soaps & detergents.
• Used for paper making.
• Used for making synthetic fibres.