Question

Write the formulae for the following.
Calcium chloride

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.
• Calcium chloride is a compound containing Calcium as cation and Chlorine as anion with symbols and valencies $\mathrm{Ca}\mathrm{and}\mathrm{Cl}-+2\mathrm{and}-1.$
• By the criss-cross method, $$\begin{gathered} \mathrm{Ca}\mathrm{Cl} \\ +2-1 \\ \overline{{\mathrm{CaCl}}_2} \end{gathered}$$.
• The chemical formula of Calcium chloride is ${\mathrm{CaCl}}_2$.