A Handbook States That to Prepare a Particular Buffer Solution

Multiple Choice

A handbook states that to prepare a particular buffer solution mix 63.0 mL of 0.200 M aqueous HC₂H₃O₂ with 37.0 mL of 0.200 M aqueous NaC₂H₃O₂.What is the pH of this buffer? (K_a = 1.8 × 10^-5)

A) 4.74
B) 4.51
C) 4.98
D) 5.33
E) 7.00