Problem 14-89

In water: H₂O H⁺ + OH^-     with     [H⁺] = [OH^-] =10^-7 M

Part b: The base concentration added, M(OH^-) = 10^-10 M is 1000 times less than the natural [OH^-] concentration.

Therefore, in this case, the pH will remains unaffected. pH = 7.0