When electricity is passed through an aqueous solution of sodium chloride, three products are obtained. Name the products. Why the process is called chlor-alkali process?

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Solution

when electricity is passed through an aqueous solution of sodium chloride it decomposes to form sodium hydrooxide (NaOH), Cl₂(g) and H₂ (g) as shown below
2NaCl(aq) + 2H₂O(l) ----> 2NaOH +Cl₂(g) + H₂ (g)

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

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Q. Answer the following:
(a) Why is plaster of Paris written as

{CaSO}_{4} . \frac{1}{2} H_{2} O

? How is it possible to have half a water molecule attached to CaSO₄?
(b) Why is sodium hydrogencarbonate an essential ingredient in antacids?
(c) When electricity is passed through an aqueous solution of sodium chloride, three products are obtained. Why is the process called chlor-alkali?

Question 2

(a) What are the uses of products obtained from the chloralkali process?

(b) What happens if we pass an electric current through a saturated solution of sodium chloride?

Q. The process of preparation of sodium hydroxide is carried out by passing electricity through an aqueous solution of sodium chloride.

What are the uses of products obtained from the chlor alkali process?

When electricity is passed through an aqueous solution of brine, it decomposes to form 'X'. This process is called 'Y' becuase of the products formed. Products 'Z' and 'W' are formed at the cathode and the anode respectively. Identify, X, Y, Z and W.

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