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Q.

In the titration of a weak acid with a strong base. 

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a

Phenolphthalein cannot be used as an indictor 

b

At half of the equivalence point, pH = pKa

c

pH at the equivalence point will be 7.0

d

At the equivalence point, pH = pKindicator ± 1

answer is B, D.

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Detailed Solution

(A) is wrong because when the base is strong, phenolphthalein is used as indictor.

(C) is wrong because the salt formed will be of weak acid and strong base and hence pH will

be greater than 7.

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