The hydroxide-ion concentration is 4.0x10-6 M, what is the pOH of the solution? 

Expert Answers

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The hydroxide ion concentration is given as 4 x 10^-6 M

[OH-] = 4 x 10^-6 M

The pOH is defined as 

pOH = -log [OH-] = -log [4 x 10^-6] 

= 5.398 ~ 5.4

Hope this helps.

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