A solution with [ OH-] of 5 x 10-3 has a pH of ________.?

1 Answer

  • Step 1: Find the pOH.

    pOH = -log[OH-]

    pOH = -log(5 x 10^-3)

    By the way the “^” symbol here means “to the power of”.

    Put that into your scientific calculator and you should get something like:

    pOH = 2.301029996

    Step 2: Now that you have your pOH, subtract that from 14 to get your pH.

    pH = 14 – pOH

    pH = 14 – 2.301029996

    pH = 11.69897

    There you go.

    Source(s): AP Chemistry student

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