A solution has [OH-] = 2:0 x 10-14 M. The [H+] in this solution is?

Question

1. None of these
2. 1.4 x 10-7 M
3. 0.50 M
4. 5.0 M
5. 2:0 x 10-14 M

Answer 1

[OH-]*[H+] = 10^-14, the dissociation constant of water. Therefore

[H+] = 10^-14 / [OH-]

[H+] = 10^-14 / 2*10^-14 = 0.5M