Question

The [OH-] ion concentration of a sample is 1 × 10-10 M. What is the concentration of [H+] in the sample at 25°C?

A. 1 × 10-14 M
B. 1 × 10-4 M
C. 1 × 10-10 M
D. 1 × 10-6 M

I think the answer is C. is this correct?

Answer 1

No.
(H^+)(OH^-) = Kw = 1E-14.
You know OH, solve for H.

Answer 2

it's B