Calculate the PH of a 0

Multiple Choice

Calculate the pH of a 0.080 mol L^-1 aqueous carbonic acid solution,H₂CO_{3(aq) ,}that has the stepwise dissociation constants K_a1 = 4.3 × 10^-7 and K_a2 = 5.6 × 10^-11.

A) 1.10
B) 3.73
C) 6.37
D) 10.25