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 $