Temporary hardness may be removed from water by adding :

Chemistry Hydrogen and Its Compounds ( Not in Syllabus ) Water or Hydride of Oxygen Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 12, 2026

Ca(OH) 2

CaCO 3

CaSO 4

HCl

Text Solution

Verified by Experts

The correct answer is:

Ca(OH) 2 reacts with Ca(HCO 3 ) 2 to precipitate CaCO 3

Ca(HCO 3 ) 2 + Ca(OH) 2 ⎯→ 2CaCO 3 ↓ + 2H 2 O

Mg(HCO 3 ) 2 + 2Ca(OH) 2 ⎯→ 2CaCO 3 ↓ Mg (OH) 2 ↓ + 2H 2 O

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