Which of the following identifies the four species that are present in an aqueous solution of the weak acid H₂C₂O₄H₂C₂O₄, from the highest to the lowest concentration at equiLiBrium?
1) H3O > HC2O4 > C2O42 > H₂C₂O₄
2) H3O > C2O4 > HC2O4 > H₂C₂O₄
3) H₂C₂O₄ > HC2O4 > C2O4 > H3O
4) H₂C₂O₄ > H3O > HC2O4 > C2O4
