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Decimolar weak monoprotic acid (pKa = 4....

Decimolar weak monoprotic acid `(pK_a = 4.8)` is titrated with decimolar potash solution.
What is the pH at half-equilvalence point ?

Text Solution

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At half the equivalence point 50% of the acid is consumed for salt formation and remaining 50% of acid is unconsumed.
This is a good buffer, (salt] = [acid]
pH at half-equilvalence point = `PK_a` = 4.8
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