Using the hydrochloric acid a 5.00 mL sample of barium hydroxide is titrated to the phenolphthalein endpoint. The five mL sample needs 18.02 mL of 0.0873 M HCI solution to reach the endpoint. Determine the concentration of the Ba (OH)2 solution?
Ba(OH)2 (aq) + 2 HCI (aq)--->BaCI2 (aq) + 2H20(I)