Question

What do you understand by the following terms?

(a) Chemical Equation

Answer 1

Chemical equation:
All chemical changes are accompanied by chemical reactions. These reactions can be described in sentence form, but the description would be quite long. Chemical equations have been framed to describe chemical reactions.
“A chemical equation is a shorthand representation of a chemical reaction using the symbols and formulae of substances involved in the chemical reaction.”

The chemical reaction between Zinc and Hydrochloric acid is represented as:
$$\begin{gathered} \underset{\left(\mathrm{Reactants}\right)}{\mathrm{Zinc}+\mathrm{Hydrochloric}\mathrm{acid}}\to \underset{\left(\mathrm{Products}\right)}{\mathrm{Zinc}\mathrm{chloride}+\mathrm{Hydrogen}} \\ \underset{\mathrm{Reactants}}{\mathrm{Zn}+2\mathrm{HCl}}\to \underset{\mathrm{Products}}{{\mathrm{ZnCl}}_2+{\mathrm{H}}_2} \end{gathered}$$