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Equilibrium

Question
CBSEENCH11006553

The dissociation constant of an acid HA is 1·6 X 10–5. Calculate the H3O+ ion concentration in its 0·01 M solution.

Solution
Here Ka of acid = 1·6 × 10–5
Molar space concentration space of space acid space space equals space 0.01 space straight M
space space open square brackets straight H subscript 3 straight O to the power of plus close square brackets space equals square root of straight K subscript straight a space cross times space straight C end root
space space space space space space space space space space space space equals square root of 1.6 space cross times space 10 to the power of negative 5 end exponent space cross times space 0.01 end root
or space space space open square brackets straight H subscript 3 straight O to the power of plus close square brackets space equals space 4 space cross times space 10 to the power of negative 4 end exponent space space mol space straight L to the power of negative 1 end exponent