Question

What do you understand by a chemical equation?

Answer 1

Definition of a chemical equation

A chemical equation is the symbolic representation of a chemical reaction in the form of symbols and formulae, wherein the reactant entities are given on the left-hand side and the product entities on the right-hand side.

Explanation

• Matter during a chemical reaction breaks into atoms of the reactant which rearrange to form products these reactants will break apart and recombine in a new way which makes the products.
• The coefficients next to the symbols and formulae of entities are the absolute values of the stoichiometric number

Parts of chemical reaction

• Chemical Formulas ( $\mathrm{NaOH}$)
• Reactants & Products (${\mathrm{CaCO}}_3\to \mathrm{CaO}+{\mathrm{CO}}_2$)
• Reaction Arrow($\to /\stackrel{∆}{\to }$)
• Plus Signs ($+$)
• Coefficients($2\mathrm{Na}$)
• Subscripts(${\mathrm{H}}_2\mathrm{O}$)
• States of matter(${\mathrm{CO}}_2\left(\mathrm{g}\right)$)

Example $\underset{\mathrm{calcium}\mathrm{carbonate}}{{\mathrm{CaCO}}_3\left(\mathrm{s}\right)}\stackrel{∆}{\to }\underset{\mathrm{calcium}\mathrm{oxide}}{\mathrm{CaO}\left(\mathrm{s}\right)}+\underset{\mathrm{carbon}\mathrm{dioxide}}{{\mathrm{CO}}_2\left(\mathrm{g}\right)}$