Calculate the hydrogen ion concentration, pH, POH, OH‐ in 0.02 H2SO4?

Answer 1

H2SO4 is a strong acid for the first H^+.
k2 = about 0.12 but you should look that up to make sure. I may not have remembered it correctly.
.............H2SO4 ==> H^+ + HSO4^-
I..............0.02............ 0..........0
C............-0.02...........+0.02...+0.02
E..............0..................0.02.....0.02

.............HSO4^- ==> H^+ + SO4^2-
I..................0.02........0.02......0
C..................-x...........+x.........x
E............0.02-x.........0.02+x......x
k1 = about 0.012 = (H^+)(SO4^-2)/(HSO4^-)
Plug in the E line into the k1 expression and solve for x to give you the concentrations of each specie. The you can do pH, pOH, H^+ and OH^-