# Chemistry

what are the concentrations of hydrogen ions and hydroxide ions in a solution that has a oh of 5? *please include work done so I can understand*

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asked by Sara
1. pH = 5
pH + pOH = pKw = 14 from which you can find pOH.
Then pH = -log(H^+)
and pOH = -log(OH^-).
If pH = 5, then H^+ = 1E-5. You get that straight from the calculator.
If pH = 5, then pOH = 9 and OH^- = 1E-9 (straight from the calculator) but you can do those in your head.

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