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Answer to Question #56385 in General Chemistry for kelly

Question #56385
Calculate the [OH−] of aqueous solution with the pH = 11.0.
Express your answer using two significant figures.


[OH−] = ???
Expert's answer
The sum of pH and pOH is equal 14, from it we can find pOH.
pH + pOH = 14
pOH = 14 - pH = 14-11 = 3
From the formula for pOH calculation we can estimate the concentration of [OH-].
pOH = - log [OH-]
[OH-] = 1x10^-3 M = 0.001 M

Answer:
[OH-] = 0.001 M

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