Question

The chemical formula of washing soda is:

• A. $N{a}_{2}C{O}_3.7H_{2}O$
• B. $N{a}_{2}C{O}_3.10H_{2}O$
• C. $N{a}_{2}C{O}_3.H_{2}O$
• D. $N{a}_{2}C{O}_3$

Answer 1

The correct option is B $N{a}_{2}C{O}_3.10H_{2}O$

Washing soda is sodium carbonate decahydrate. Its chemical formula is ${\text{Na}}_2{\text{CO}}_3.10{\text{H}}_2\text{O}$. In this formula the ${\text{H}}_2\text{O}$ indicates the water content.