P786: Separation of a mixture by fractional distillation and chromatography

Author: Mark P.T. Mojesky, Danville High School, USA

Co-Author:

Date: 8/6/14

Time: 9:35 AM9:55 AM

Room: MAK B1100

Related Symposium: S63

The AP Chemistry curriculum has always had a large component of student investigative laboratory experimentation. The redesign of 2013-14 emphasizes guided inquiry as one of its key components. Using guided inquiry, fractional distillation and chromatography were employed to motivate and enhance the student laboratory experience. Students were given a problem to separate and analyze an unknown liquid mixture. Phase two of this work focuses on student driven presentations as an alternate method of assessment. Students were expected to utilize several methods of technology to supplement their presentations. The major criteria would include methods, findings, conclusions, and a forecast of improved methodology and future experimentation. These presentations were delivered in conjunction with a larger assessment, roundtable discussions. Roundtable discussions were employed to gather further evidence of student learning.