Question

Potassium chloride is added to water and stirred . a salt solution is obtained which is then boiled leaving behind a residue.
Give a reason why the above experiment would not be possible if calcium carbonate is taken , in place of potassium chloride.

Answer 1

This experiment would not be possible because on heating CaCo3 it will get converted into CaO and CO2 whichi will escape without leaving any residue.

Answer 2

The reason why calcium carbonate can not be taken is because it is an insoluble salt

Calcium carbonate does not dissolve in water.


All carbonates are insoluble except:

a) Sodium carbonate

b) Potassium carbonate, and

c) Ammonium carbonate