Question

_____ is the chemical formula of Glauber's salt.

• A. ${\text{Na}}_2{\text{SO}}_4.10{\text{H}}_2\text{O}$
• B. ${\text{MgSO}}_4.7{\text{H}}_2\text{O}$
• C. ${\text{Na}}_2{\text{CO}}_3.10{\text{H}}_2\text{O}$
• D. $\text{Ba}{\text{Cl}}_2.2{\text{H}}_2\text{O}$

Answer 1

The correct option is A ${\text{Na}}_2{\text{SO}}_4.10{\text{H}}_2\text{O}$

The table given below shows the chemical formula of various salts containing water of crystallisation.
$$\begin{array}{cc}\text{Salts}& \text{Chemical formula}\\ \text{Glauber's salt}& {\text{Na}}_2{\text{SO}}_4.10{\text{H}}_2\text{O}\\ \text{Washing soda}& {\text{Na}}_2{\text{CO}}_3.10{\text{H}}_2\text{O}\\ \text{Epsom salt}& {\text{MgSO}}_4.7{\text{H}}_2\text{O}\\ \text{Borax}& {\text{Na}}_2{\text{B}}_4{\text{O}}_7.10{\text{H}}_2\text{O}\end{array}$$