pH is a measure of the acidity or basicity of a solution. The range is 0-14 and 7 is neutral. A pH below 7 indicates that the solution is acidic, and a pH above 7 indicates a basic solution. pH is actually a measure of the relative amount of free hydrogen and hydroxyl ions in solution. Solutions containing more free hydrogen ions are acidic, while solutions containing free hydroxyl ions are inherently basic.
Sodium chloride, commonly known as a salt, is an ionic compound with the chemical formula $\mathrm{NaCl}$ and represents the ratio of sodium and chloride ions. It is a salt consisting of a strong acid, that is, hydrogen chloride ($\mathrm{HCl}$) and a strong base, that is, sodium hydroxide ($\mathrm{NaOH}$). Therefore, when dissolved in water, the ratio of hydrogen ions to hydroxyl ions is equal. This makes the solution neutral. H. The pH scale is 7.
$\mathrm{NaOH} + \mathrm{HCl} \to \mathrm{NaCl} + {\mathrm{H}}_2\mathrm{O}$
Therefore, the pH of the aqueous $\mathrm{NaCl}$ solution is 7.