A student added 5.38g of Al(OH)3 to a beaker which is having the 250.0 ml of a 1.00M HCl solution , stirred it, and observed that the solid dissolved totally. Then the student titrated the solution with a 2.00M NaOH(aq). A drop of indicator showed that the solution was still acidic. Determine the numbers of milliliters of the NaOH solution were needed for the titration?