Question

Write down the formula of sodium sulphate using the Criss cross method.

Answer 1

Sodium sulfate:

• The ions present in the compound sodium sulfate are: Sodium ion ${\mathrm{Na}}^{+}$, and Sulfate ion ${\left({\mathrm{SO}}_4\right)}^{2-}$ .

Formula of sodium sulfate

• By criss cross method, its chemical formula will come out as ${\mathrm{Na}}_2{\mathrm{SO}}_4$.