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09-03-2019
Chemistry

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What is the ph at the half-stoichiometric point for the titration of 0.22 m hno2(aq) with 0.01 m koh(aq)? for hno2, ka = 4.3 × 10−4 ?

Respuesta :

19-03-2019

Answer;

pH = 3.37

Explanation;

At the half-equivalence (stoichiometric) point,

pH = pKa = -log(Ka);

Therefore;

pKa = -log(4.3 x 10^-4)

= 3.37

Hence, pH = 3.37

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