Assignment:
Consider a solution that is 0.10 M in a weak triprotic acid that is represented by the general formula H3A with the following ionization constants:
For H3A: Ka1= 1.0 x 10 ^-3 Ka2= 1.0 x 10 ^-8 Ka3= 1.0 x 10 ^-12
What is the concentration of HA^ 2- ?
a) 4.5 x 10^-3 M
b) 1.0 x 10^-4 M
c) 3.2 x 10^-5 M
d) 1.0 x 10^-8 M
e) 6.2 x 10^-7 M