Question

What is the pH of a solution with a hydroxide ion concentration of 10^-6^m

A:pH =8
B:pH =7
C:pH =12
D:pH =6

Answer 1

-log(10^-6) = [OH-] then remeber that [H+] + [OH-] = 14

Answer 2

remember*

Answer 3

\[\color{green}{\text{pH} = - \log [\text{H}_3\text{O}^{+}]}\]

Answer 4

Would it be D? If not what am I doing wrong?

Answer 5

Hydroxide ion [OH-].....so you use pOH = -log[OH-], in this case its 6.

14 - pOH = pH

14- 6 = pH