While attempting to recrystallize maleic anhydride, a student dissolved it in freshly distilled cyclopentadiene rather than in freshly distilled cyclopentane.Was her recrystallization successful?

Chemistry of Solutions Lecture 11 Tuesday, October 4, 2016 Exercise Continued: calculate the pH of a 1.00x10 M H SO solution, for2the 4econd dissociation of H SO2. 4 The major species are H + , HSO - , and H O . (aq) 4 (aq) 2 (l) -2 -3 K a 1.2 x 10 , don't approximate because K must be at aeast 10 smaller than the initial concentration of H SO 2 4 1.2x10 = [HSO ] [H ]4/ [H SO ] 2 4 -2 -2 -2 1.2x10 = (1.0x10 + x) (x) / (1.0x10 – x) (1.2x10 )(1.0x10 – x) = (1.0x10 + x ) -2 2 Using the Quadratic Equation: a = 1, b = 2.2x10 , c = -1.2x10 . -4 -2 -