Question

A student is asked to standardize a solution of barium hydroxide. He weighs out 1.09 g potassium hydrogen phthalate (KHC,H,O4, treat this as a monoprotic acid). It requires 16.1 mL of barium hydroxide to reach the endpoint. A. What is the molarity of the barium hydroxide solution? M This barium hydroxide solution is then used to titrate an unknown solution of nitric acid. B. If 25.1 mL of the barium hydroxide solution is required to neutralize 10.4 mL of nitric acid, what is the molarity of the nitric acid solution? M Submit Answer Retry Entire Group 8 more group attempts remaining

Answer 1

moles of KHC SHA OA = 1.09g = 5.337 monol 204,22g/ml At end point mmoles of KM Co H4O 4 = 5.337 mond, 2 moles of Ba(OH) 5.33= 2x volumex nolarity 5.33 = 2X 16.1M LAMI Mico 165M a, Movi = A2 M₂ V2 2x0.165x 25.1 = 1x M2 X 10.4 M2 = 2x0.165*25.) 10.4 Mza 0.796M