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Question

(a) What is the difference between washing soda and baking soda?
ā€‹(b) Write the chemical formula for bleaching powder. How is bleaching powder prepared? For what purpose is it used in paper factories?

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Solution

(a) Washing soda: Chemical formula of washing soda is Na2CO3.10H2O. Washing soda used as a cleansing agent in domestic household purposes.

Baking Soda: Chemical formula of baking soda is NaHCO3. Baking soda is used as an antacid to remove acidity in the stomach.

(b) The chemical formula of bleaching powder is CaOCl2.
Bleaching powder is prepared by passing chlorine gas over dry calcium hydroxide.
Ca(OH)2+Cl2CaOCl2bleaching powder+H2O

Bleaching powder is used in paper factories for bleaching wood pulp, as bleaching powder is a strong oxidizing agent.

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