Question

Write the formulae for the following.
Sodium Carbonate

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.
• Sodium carbonate is a compound containing Sodium as cation and Carbonate as polyatomic anion with symbols and valencies $\mathrm{Na}\mathrm{and}{\mathrm{CO}}_3-+1\mathrm{and}-2.$
• By the criss-cross method, $$\begin{gathered} {\mathrm{Na}}^{+}{\mathrm{CO}}_3^{2-} \\ +1-2 \\ \overline{{\mathrm{Na}}_2{\mathrm{CO}}_3} \end{gathered}$$.
• The chemical formula of Sodium carbonate is ${\mathrm{Na}}_2{\mathrm{CO}}_3$.