The pH of a solution is 4, what should be the change in hydrogen ion concentration of the solution if its pH is to be increased to 5?

Answer 1

A solution of pH = 4 has a hydrogen ion concentration [H⁺] = 10^-4 = 1 x 10^-4 M

A solution of pH = 5 has a hydrogen ion concentration [H⁺] = 10^-5 = 1 x 10^-5 M

Change in [H⁺] = 1 x 10^-4 M / 1 x 10^-5 M = 10