Question

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 ?

Answer 1

Answer;

pH = 3.37

Step-by-step 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