Question

"What is the [ H3O+] in a solution with [OH-] = 1 × 10-12 M?

A. 1×10^-12 M
B. 1×10^2 M
C. 1×10^-7 M
D. 1×10^-8 M
E. 1×10^-2 M"

Answer 1

The [H3O+] in a solution with [OH-] = 1 × 10^-12 M is 1 × 10^-2 M.

Step-by-step explanation:

The concentration of both the hydronium ion ([H3O+]) and the hydroxide ion ([OH-]) in a solution are related by the equation [H3O+] x [OH-] = 1.0 x 10^-14. Given that [OH-] = 1 x 10^-12 M, we can solve for [H3O+]. Substitute the value of [OH-] into the equation:

[H3O+] x (1 x 10^-12 M) = 1.0 x 10^-14

Divide both sides by (1 x 10^-12 M) to solve for [H3O+]:

[H3O+] = (1.0 x 10^-14) / (1 x 10^-12 M) = 1 x 10^-2 M