“The pH of 10-8 N HCl solution is 8” –True or false? justify your answer.

The statement is false. Here's why:

The pH of a solution is determined by the negative logarithm (base 10) of the concentration of hydrogen ions (H+) in that solution. In other words, pH = -log[H+].

In the case of HCl (hydrochloric acid), it is a strong acid. This means it completely ionizes in water to form H+ and Cl- ions. So, the concentration of H+ ions in a HCl solution is equal to the concentration of HCl itself.

Given that the concentration of HCl is 10^-8 N (Normal), the concentration of H+ ions is also 10^-8 N.

Therefore, the pH of the solution is -log(10^-8) = 8.

However, the pH scale ranges from 0 to 14, with 7 being neutral. Values less than 7 indicate acidity, while values greater than 7 indicate alkalinity (basicity).

Since HCl is an acid, its pH should be less than 7. But in this case, the calculated pH is 8, which is greater than 7 and falls under the basic range.

Therefore, the statement "The pH of 10^-8 N HCl solution is 8" is false. The pH of a HCl solution should be less than 7, not 8.