Question

write down preparation of washing soda​

Answer 1

ANSWER-

Preparation of Washing Soda — It is prepared by Solvay's process. (1) A cold and concentrated solution of sodium chloride is reacted with ammonia and carbon dioxide to obtain sodium hydrogen carbonate. (2) Sodium hydrogen carbonate is separated by filtration,dried and heated. Oh heating sodium hydrogen carbonate decomposes to form sodium carbonate...

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Answer 2

Explanation:

Preparation of Washing Soda

Washing soda is synthesized through Solvay’s process. Solvay’s process involves the reaction of sodium chloride, ammonia and carbon dioxide in water. Carbon dioxide involved is produced through calcium carbonate and the calcium oxide left is used in recovering ammonia from ammonium chloride.

At first, sodium bicarbonate is obtained which is then converted to sodium carbonate on heating. Finally, washing soda is produced by recrystallization of sodium carbonate.

NaCl + NH3 + CO2 + H2O → NaHCO3 + NH4Cl

2 NaHCO3 → Na2CO3 + H2O + CO2

Na2CO3 + 10H2O → Na2CO3.10H2O

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