Question

20. Point out the mistakes in the following and correct them:

(vi) ${\mathrm{Mg}}_2{\left({\mathrm{SO}}_4\right)}_3$

Answer 1

1. The valency of Magnesium ($\mathrm{Mg}$) is$+2$.
2. The charge on Sulphate ion is$-2$.
3. One Magnesium ($\mathrm{Mg}$) atom can lose only two electrons.
4. One Sulphate (${\mathrm{SO}}_4^{2-}$) ion needs $+2$a charge to cancel its charge.
5. So, one Magnesium atom will react with one Sulphate ion to give Magnesium sulphate.
6. The chemical formula of Magnesium sulphate is${\mathrm{MgSO}}_4$.