Question

In an experiment, sodium hydroxide solution reacts with a hydrochloric acid solution to produce sodium chloride solution and water.

Write the balanced equation (with physical states) for this experiment.

Answer 1

$\mathrm{NaOH}+\mathrm{HCl}\to \mathrm{NaCl}+H_{2}O$

Examining the equation, it is concluded that the equation is already balanced.

The physical states are as the NaOH, HCl and NaCl are solutions in water, hence written as (aq).
H2O is water in the liquid state, written as (l).

$\mathrm{NaOH}\left(\mathrm{aq}\right)+\mathrm{HCl}\left(\mathrm{aq}\right)\to \mathrm{NaCl}\left(\mathrm{aq}\right)+H_{2}O\left(l\right)$