Question

State what happens when a concentrated solution of sodium chloride (brine) is electrolysed ? Name the process. Write the equation of the reaction involved. Write the names of the products obtained. Mention one use of each product

Answer 1

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• When a concentrated solution of sodium chloride is electrolysed, it decomposes to form sodium hydroxide, chlorine and hydrogen.

• Chlor-alkali Process

• 2NaCl(aq) + 2H2O(l) -> 2NaOH(aq) + Cl2(g) + H2(g)

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Products Formed:-

Sodium hydroxide, chlorine and hydrogen.

>Uses of Sodium hydroxide:

It is used for making soaps and detergents.

>Uses of chlorine:

It is used in the production of bleaching powder.

>Uses of hydrogen:

It is used in the production of hydrochloric acid.