There were two acid solutions: 0.1 M HCl and 0.1 M H2SO4 , 250 mL each in two identical volumetric flasks prepared by a lab technician. Unfortunately, she forgot to label them and there were no more concentrated acids left in the lab. She found 1L of a standard 0.1 M NaOH solution in the stock. How would you suggest her in detail to figure out and identify those two unlabeled solution? (show all involved chemical reactions)