The PH of a 0 $\times$ 10^-3
C)7 $\times$ 10^-3
D)8 $\times$ 10^-6
E)7

Multiple Choice

The pH of a 0.17 M solution of a weak monoprotic acid,HA,is 2.92.Calculate the K_a for this acid.

A) 0.17
B) 1.2 $\times$ 10^-3
C) 7.1 $\times$ 10^-3
D) 8.6 $\times$ 10^-6
E) 7.3 $\times$ 10^-11