Verified Answer :

Willchemistry

First you calculate the pOH of the solution:

pH+ pOH = 14

3.25 + pOH = 14

pOH = 14 - 3.25

pOH = 10.75

Concentration of [OH]⁻ in solution:

[ OH⁻ ] = \(10 ^{-pOH}\)

[ OH⁻ ]  = 10^ - 10.75

[OH⁻] = 1.778 x 10⁻¹¹ M

hope this helps !


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