Write the chemical equation for the following activities:

NaOH solution was added to HCl solution.

Balanced chemical equation: A balanced chemical equation is the representation of a chemical reaction in which the number of atoms of each element is the same on both the reactant and product sides.

Neutralization Reaction:

• In a neutralization reaction, an acid and a base react to produce water and salt.
• It is an exothermic reaction, hence it releases heat.
• Here the acid is Hydrochloric acid $\left(\mathrm{HCl}\right)$ and the base is Sodium Hydroxide $\left(\mathrm{NaOH}\right)$.
• So, when Sodium hydroxide is added to the hydrochloric solution, the formation of a salt sodium chloride and water takes place.

Balanced Chemical Equation: $\underset{\mathrm{Sodium}\mathrm{hydroxide}}{\mathrm{NaOH}\left(\mathrm{aq}\right)}+\underset{\mathrm{Hydrochloric}\mathrm{acid}}{\mathrm{HCl}\left(\mathrm{aq}\right)}\to \underset{\mathrm{Sodium}\mathrm{chloride}}{\mathrm{NaCl}\left(\mathrm{aq}\right)}+\underset{\mathrm{Water}}{{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)}$