Question

Write the formulae for the following.
Magnesium hydroxide

Answer 1

• A chemical formula is a representation of a substance's molecular composition in terms of the symbols for the elements that make up the molecule.
• Magnesium hydroxide is a compound containing Magnesium as cation and Hydroxide as polyatomic anion with symbols and valencies $\mathrm{Mg}\mathrm{and}\mathrm{OH}-+2\mathrm{and}-1.$
• By the criss-cross method, $$\begin{gathered} {\mathrm{Mg}}^{+}{\mathrm{OH}}^{-} \\ +2-1 \\ \overline{\mathrm{Mg}{\left(\mathrm{OH}\right)}_2} \end{gathered}$$.
• The chemical formula of Magnesium hydroxide is $\mathrm{Mg}{\left(\mathrm{OH}\right)}_2$.