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when a 30.0 ml sample of a 0.461 m aqueous nitrous acid solution is titrated with a 0.467 m aqueous barium hydroxide solution, what is the ph at the midpoint in the titration?

Respuesta :

The pH at midpoint in the titration will be 3.16

The pH at the midpoint of the titration (the half-equivalence point) will be equal to the pKa of nitrous acid i.e. 3.16. The calculation is quite simple as the Ka value is 4.0 x 10^-4. To find pKa =  -log Ka.

Thus, pKa = -log (4.0 x 10^-4) = 3.16

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