How do the ions is Na2CO3 separate in an aqueous solution

(the numbers in the empirical formula are suppose to be subscript)

Sodium carbonate dissociates to make sodium ions and carbonate ions, and carbonate ion promptly reacts with water to make HCO3- and OH-. The reaction is ....

Na2CO3(s) + H2O(l) --> 2Na+ + OH- + HCO3-