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JAMB - Chemistry (1990 - No. 39)
What is the concentration of H
+
ions in moles per dm
3
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
Uitleg
PH = -log (H
+
)
(H
+
) = 10
-4
.348 = 4.0 χ 10
-5
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