Answer to Question #193155 in Inorganic Chemistry for Secret

Question

According to the acid-base titration curve given in the figure, why the curve at half equivalance point is flat?

a.)Due to the buffering capacity of weak acid-conjugate base

b.)Since,pH at half equivalance point is 7.

c.)Because concentration of titrant NaOH is not low.

d.)Since, Ka<10^-4 and assumptions do not work

e.)Since HA concentration is <10^-6 M and proton source from water becomes significant.

Answer 1

a.)Due to the buffering capacity of weak acid-conjugate base.