The hydrated salt Na 2 CO 3 ⋅ xH 2 O undergoes 63 % loss in mass on heating and becomes anhydrous. The value of x is

Question

The hydrated salt Na 2 CO 3 ⋅ xH 2 O undergoes 63 % loss in mass on heating and becomes anhydrous. The value of x is (A) 3 (B) 5 (C) 7 (D) 10

Tardigrade Admin · Accepted Answer

The loss in mass is due to elimination of water of crystallisation of Na 2 CO 3 ⋅ xH 2 O Hence, (18 x × 100/106+18 x)=63 ⇒ x=10

Q. The hydrated salt $N a_{2} C O_{3} \cdot x H_{2} O$ undergoes $63%$ loss in mass on heating and becomes anhydrous. The value of $x$ is