A sample of 0.100 M weak acid HB is titrated with 0.100 M NaOH

CHEMISTRY · Single correct · AP · Chemistry · Acids and Bases · Acids and Bases

Problem

25.00\,\text{mL}

sample of 0.100 M weak acid HB is titrated with 0.100 M NaOH. After

10.00\,\text{mL}

of NaOH has been added, the pH of the solution is 4.28. What is the

pK_a

of HB? (a)

4.28

(b)

4.68

(c)

4.46

(d)

4.10