Hydrogen And Its Compounds Question 42

Question: Temporary hardness may be removed from water by adding

[Pb. PMT 2002]

Options:

A) $ CaCO_3 $

B) $ Ca{{(OH)}_2} $

C) $ CaSO_4 $

D) HCl

Show Answer

Answer:

Correct Answer: B

Solution:

$ Ca{{(HCO_3)}_2}+Ca{{(OH)}_2}\to \underset{ppt\text{.}}{\mathop{2CaCO_3\downarrow }}+4H_2O $