The pH of an unknown solution is 2.1.Its [OH^-] is:

Name: The pH of an unknown solution is 2.1.Its [OH - ] is:
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Question

Quizplus · Accepted Answer

The [OH-] can be found using the formula: [H+][OH-] = 1.0 x 10^-14
Since the pH is 2.1, the [H+] can be found by taking the antilog of -2.1, which is 7.94 x 10^-3 M.
Substituting this value into the formula, we get:
(7.94 x 10^-3 M)([OH-]) = 1.0 x 10^-14
[OH-] = 1.3 x 10^-12 M (Option B)

The PH of an Unknown Solution Is 2