What is the pH of a solution whose hydroxide ion concentration, [OH-], is 4.3 × 10-4 M?
What is the pH of a solution whose hydroxide ion concentration, [OH-], is 4.3 × 10-4 M?
10.63
3.36
7.75
6.30
1 Answer
-
[H+][OH-] = Kw = 1.0 x 10^-14
[H+] = 1.0 x 10^-14/4.3 x 10^-4
[H+] = 2.33 x 10^-11
pH = -log[H+] = -log(2.33 x 10^-11)
pH = -(-10.63) = 10.63
