Question

$N{a}_{2}C{O}_3.10H_{2}O$, when exposed to air, looses water of crystallization and finally gives:

• A. $N{a}_{2}C{O}_3.4H_{2}O$
• B. $N{a}_{2}C{O}_3.H_{2}O$
• C. $N{a}_{2}C{O}_3.7H_{2}O$
• D. $N{a}_{2}C{O}_3.9H_{2}O$

Answer 1

The correct option is B $N{a}_{2}C{O}_3.H_{2}O$

$N{a}_{2}C{O}_3.10H_{2}O$ is efflorescent and looses 9 water molecules on exposure to air to give $N{a}_{2}C{O}_3.H_{2}O$.