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the pH at the equivlence point for the titration of a weak base versus a strong...

the pH at the equivlence point for the titration of a weak base versus a strong acid will always be

ph < 7
ph > 7
ph = 7
ph = pKa
ph = pKb

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Answer #1

The pH at equivalence point for weak base v/s strong acid titration will always be less than 7.

This is due to the production of a conjugate acid during the titration which further reacts with H2O to give hydronium ions (H3O+).

Taking an example of Ammonia (weak base) v/s hydrochloric acid (strong acid)

NH3 + HCL ---> NH4+ + CL-

The conjugate acid in this titration is NH4+ which reacts with water . Therefore, pH is less than 7.

NH4+ + H2O ----> H3O+ + NH3

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