Question

State what happens when a concenarrated solution of sodium chloride is electrolysed? Name the process and justify it.


Write the equation of the reaction involved.

Write the names of the products obtained. Mention one use of each product.

Answer 1

When conc. solution of sodium chloride undergeoes electrolysis, we get NaOH, Chlorine gas and Hydrogen gas. The process is named as Chlor-Alakli process. 2NaCl. + 2H2O -->2NaOH + Cl2 + H2 the gas liberated at anode is chlorine and gas liberated at cathode is hydrogen. the raw material used is concentrated solution of sodium chloride also known as brine. Uses: Sodium Hydroxide : 1. used in preparing soaps and detergents. Chlorine gas: 1. Used as a disinfectant in swimming pool and sterlise drinking water. Hydrogen Gas: 1. Used in hydrogenation of oils to obatin solid fats called Vegetable dalda. 2.Liquid hydrogen is used as a fuel for rockets.