I need help with this question. So i know how to do the calculation part but unfortunately i don’t know how to do the balanced equation for Ka1, Ka2, Ka3.

Calculate the H3O+, H3Cit, H2Cit-, HCit2-, and Cit3- concentrations in an 1.00 M solution of citric acid. (H3Cit: Ka1 = 7.5 x 10-4, Ka2 = 1.7 x 10- 5, Ka3 = 4.0 x 10-7)