Exactly 15.0 ml of an unknown acid was measured in a 25 ml graduated cylinder and poured into a 250 ml flask. the graduated cylinder was then rinsed with 25 ml of distilled water. the rinse was added to the 250 ml flask. an additional 75 ml of water was added to the flask along with 4-6 drops of the phenolphthalein indicator. the solution was then titrated with 0.288 m naoh. the initial burette reading was 1.63 ml. after titration, the final burette reading was 41.17 ml. calculate the molarity of the unknown acid. (hint: the acid base ratio is 1: 1) ha + naoh → naa + h2o