Hydrated sodium sulphate and hydrated copper sulphate are taken in two air tight containers X and Y respectively. When blue coloured CoCl_(2) is introduced into the two containers, there is colour change in one container. Identify the container and give reaseons in support of your answer.

Hydrated sodium sulphate and hydrated copper sulphate are taken in two

1.	Hydrated sodium sulphate and hydrated copper sulphate are taken in two air tight containers X and Y respectively. When blue coloured CoCl_(2) is introduced into the two containers, there is colour change in one container. Identify the container and give reaseons in support of your answer.
Answer» Solution :Hydrated SODIUM sulphate `RARR Na_(2)SO_(4)10H_(2)O` Hydrated copper sulphater `rarr CuSO_(4)5H_(2)O` As hydrated sodium sulphate is efflorescent in nature it loses water of crystallization. BLUE coloured `CoC1_(2)` present in container "X" absorbs moisture and turns to pink coloured `CoC1_(2)2H_(2)O` `UNDERSET("blue")(CoC1_(2)) overset("moisture")(rarr) underset("pink")(CoC1_(2)2H_(2)O)`