If 30 ML of 0 $\times$ 10^-5 at 25°C

Multiple Choice

If 30 mL of 0.10 M NaOH is added to 40 mL of 0.20 M HC₂H₃O₂,what is the pH of the resulting solution at 25°C? K_a for HC₂H₃O₂ is 1.8 $\times$ 10^-5 at 25°C.

A) 10.4
B) 4.3
C) 5.0
D) 2.7
E) 4.5