Question

A salt which does not contain water of crystallization is used for disinfecting drinking water to make it free of germs. identify the salt and write the chemical equation for its formation.

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Answer 1

Answer:

Baking soda

Explanation:

Baking Soda does not contain water of crystalisation

Formula: NaHCO3

Answer 2

The salt is aluminium sulphate.

• The chemical formula of aluminium sulphate is $Al_2(SO_4)_3$. So, it does not contain water of crystallization.
• aluminium sulphate is widely used for disinfecting drinking water to make it free of germs.
• It is prepared by the reaction of three moles of ferrous sulphate and two moles of aluminium.
• The reaction is-
• $3FeSO_4+2Al\rightarrow Al_2(SO_4)_3+3Fe$