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JAMB - Chemistry (1990 - No. 39)

What is the concentration of H+ ions in moles per dm3 of a sodium of pH 4.398?
4.0 χ 10-5
0.4 χ 10-5
4.0 χ 10-3
0.4 χ 10-3

Explication

PH = -log (H+)
(H+) = 10-4.348 = 4.0 χ 10-5

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