Question

Work out the formula for magnesium hydrogen carbonate.

Answer 1

Valency of Magnesium = 2
Valency of hydrogen carbonate ion = −1

$\begin{array}{ccc}\mathrm{Elements}/\mathrm{Ions}:& \mathrm{Mg}& {\mathrm{HCO}}_3^{-}\\ \mathrm{Valencies}:& +2& -1\end{array}$

Formula for Magnesium hydrogen carbonate can be worked out by


Therefore, formula for Magnesium hydrogen carbonate is: Mg(HCO₃)₂.