Write down the preparation method and uses of compound (washing soda).

1.	Write down the preparation method and uses of compound (washing soda).
Answer» Washing soda is a whitish, odourless powder. Its\xa0chemical formula is Na2CO3\xa0and is better known as\xa0sodium carbonate. It is hygroscopic in nature that is, it absorbs moisture from the air. It is highly soluble in water and forms strongly alkaline water solution.Washing soda is synthesized through\xa0Solvay’s process.\xa0Solvay’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\xa0ammonium 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.\tNaCl\xa0+\xa0NH3\xa0+\xa0CO2\xa0+\xa0H2O →\xa0NaHCO3\xa0+\xa0NH4Cl\t2\xa0NaHCO3\xa0→\xa0Na2CO3\xa0+\xa0H2O\xa0+\xa0CO2\tNa2CO3\xa0+ 10H2O →\xa0Na2CO3.10H2O

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