Question

The [OH-] of a solution is 7.89 10^-12 M. What is the pH of the solution? it acidic or basic? *

Answer 1

Answer: pH = 2,897 , basic$[H+][OH-] = 10^{-14} ==> [H+] = \frac{10^{-14}}{7,89*10^{-12} } =\frac{1}{789} \\pH= -lg([H+]) = 2,897 \\pH<7 ==> basic$

Explanation: