Question

The pH of aqueous $NaCl$ solution is:

Answer 1

Hint: $NaCl$ is a salt of strong acid i.e. hydrochloric acid and a strong base i.e. sodium hydroxide. We should know that salts formed from strong acid and strong base give a neutral solution when dissolved in water.

Complete step by step answer:
pH is a measure of how acidic or basic a solution is. The range goes from 0 to 14, with 7 indicating as neutral. pH’s of less than 7 indicates that solution is acidic whereas, a pH of greater than 7 indicates a basic solution. pH is really a measure of the relative amount of free hydrogen and hydroxyl ions in the solution. The solution that has more free hydrogen ions will be acidic, whereas the solution with free hydroxyl ions will be basic in nature.
Looking to the question, Sodium chloride, commonly known as salt, is an ionic compound with the chemical formula $NaCl$, representing a ratio of sodium and chloride ions. It is a salt which is composed of a strong acid i.e. hydrogen chloride ($HCl$) and a strong base i.e. sodium hydroxide ($NaOH$). So, when it is dissolved in water it will have an equal ratio of hydrogen and hydroxyl ions. Thus, making the solution neutral, that is it will have a pH scaling 7.
$NaOH+HCl\to NaCl+{{H}_{2}}O$

Hence, the pH of aqueous $NaCl$ solution will be 7.

Note: Sodium chloride, known as table salt, rock salt, sea salt, and mineral halite, is an ionic compound which consists of cube-shaped crystals composed of the element sodium and chlorine. It is an essential compound our body uses to absorb and transport nutrients, to maintain blood pressure and a right balance of fluid.