Given,
[H+]=1 * 10-4
we know that,
pH= -log ([H+]),
or pH= - log (1 * 10-4)
upon calculations we get,
pH=4;
We know that,
pH<7 (acidic)
pH=7(Neutral)
pH>7(Basic)
Since, pH=4 which is less than 7 therefore given solution is acidic.
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