Chemistry

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

4.68

4.46

4.10