If the pH is 4.5, what is the pOH ?

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asked Jan 6, 2019 201k views

1 Answer

GWW · Answer 1 · 2019-01-12T00:13:00+0000

pH+pOH=14
4.5+pOH=14
pOH=14-4.5
pOH = 9.5

We know that
[H⁺][OH⁻]=10⁻¹⁴,so

-log([H⁺][OH⁻])=-log10⁻¹⁴
-log [H⁺]+ (- log[OH⁻])= - log10⁻¹⁴,
- log[H⁺] = pH
- log[OH⁻] = pOH
- log10⁻¹⁴=-(-14)log10=14*1=14
pH + pOH =14

If the pH is 4.5, what is the pOH ?

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