In which of the following acid-base titr...

In which of the following acid-base titration, the pH is greater than 8 at the equivalence point ?

Acetic acid versus ammonia

Acetic acidversus sodium hydroxide

Hydrohloric acid versus ammonia

Hydrochloric acid versus sodium hydroxide.

Text Solution

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`CH_(3)COOH+NH_(3)rarrCH_(3)COO^(-)N^(+)H_(4)`
`CH_(3)COOH+NaOHrarr Na^(+)CH_(3)COO^(-)`
`HCl+NH_(3)rarr NH_(4)Cl`
`HCl+NaOH rarr NaCl`
pH greater than 8 at the equivalence point implies that salt formed during the titration is undergoing anionic hydrolysis. Only the salt of strong base (NaOH) and weak acid `(CH_(3)COOH)` undergoes anionic hydrolysis to give basic solution.

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