JAMB - Chemistry (2000 - No. 23)

The pOH of a solution of 0.25 mol dm\(^{-3}\) of hydrochloric acid is

12.40

13.40

14.40

14.60

解释

pOH = -log [2.5 x 10-1]
= -log[-0.3979 + 1]
= 13.40

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