Question

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$<marquee>___Explain the Preparation of Sodium hydroxide!</marquee>$



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Answer 1

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Explain the Preparation of Sodium hydroxide....?

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It is generally prepared by electrolysis of sodium chloride in Castner-kellner cell. A brine solution is electrolyzed using mercury cathode and carbon anode. Sodium metal, discharged at the cathode, combine with mercury to form sodium amalgam. Cl gas is evolved at the cathode. The amalgam is treated with water to give sodium hydroxide and hydrogen gas.

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$\color{green}{2Na/Hg+2H_2O→2NaOH+H_2+Hg}$

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Answer 2

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• Preparation: Sodium hydroxide is industrially produced using the electrolytic chloralkali process, in which electrolysis of aqueous sodium chloride solution gives chlorine gas and sodium hydroxide. NaOH is obtained as a 50% solution in water, and then dried to give solid sodium hydroxide flakes or pellets.

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