Question

Write the chemical formula for sodium sulphite?

Answer 1

• The sodium ion is denoted by ${\mathrm{Na}}^{+}$
• The sulphite ion is denoted by ${{\mathrm{SO}}_3}^{2-}$
• Interchanging the valencies, we get
• ${\mathrm{Na}}^{+}⥂{{\mathrm{SO}}_3}^{2-}$- becomes ${\mathrm{Na}}_2{\mathrm{SO}}_3$