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Question

Chemistry Question on GROUP 1 ELEMENTS

The temporary hardness of water is due to calcium bicarbonate can be removed by adding

A

CaCO3CaCO_3

B

Ca(OH)2Ca(OH)_2

C

CaCl2CaCl_2

D

HClHCl

Answer

Ca(OH)2Ca(OH)_2

Explanation

Solution

Lime treatment remove bicarbonate hardness by forming insoluble CaCO3CaCO_3 as Ca(HCO3)2+Ca(OH)22CaCO3+2H2OCa(HCO_3)_2 + Ca(OH)_2 \rightarrow 2CaCO_3 \downarrow + 2H_2O