At 50 °C, the ion-product constant of water is Kw=5.48×10−14. A titration is carried out in which 55.0 mL of 0.100 M NaOH is added to 100 mL of 0.050 M benzoic acid. What is the pH of the resulting solution at 50 °C?
a) 11.51
b) 10.77
c) 8.49
d) 11.22