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30 January, 15:08

Calculate the pH of a solution in which [OH-] = 4.5 * 10-9M.

8.35

6.11

4.94

5.65 - this one is correct

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Answers (1)
  1. 30 January, 16:16
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    5.65 is the pH.

    Explanation:

    I am assuming that you are asking for confirmation on your answer. The answer is 5.65.

    You would do:

    [pOH] = - log[OH-]

    = - log[4.5*10^-9]

    equals about 8.3468

    To find pH your would subtract the pOH from 14.

    14-8.3468 = 5.65 << Rounded to match the answer choices.
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