Dissociation of strong acids/bases

[Samantha Chung 4I]

For HW problem 6A.23, I understand that Ba(OH)2 will dissociate to form Ba2+ and 2OH- . Yet, I do not understand where the H30+ comes from after that? If it comes from water, why does not the water go into the original Ba (OH)2 dissociation equation?

[Brandon_Tran_2E]

The physical state of the chemicals (aq) indicates that the reaction occurs with water as the solvent. Therefore when the dissociation occurs, the water accepts the protons from Ba(OH)2 and becomes H3O+.