A Solution of 8 $\times$ 10^-2
B)1 $\times$ 10^-4
C)4 $\times$ 10^-3
D)3

Multiple Choice

A solution of 8.01 M formic acid (HCOOH) is 0.47% ionized.What is the K_a value of formic acid?

A) 3.8 $\times$ 10^-2
B) 1.8 $\times$ 10^-4
C) 4.7 $\times$ 10^-3
D) 3.8
E) more data is needed