Analyze the fractions as instructed for Group 1. Each team will use two collection tubes, one of them marked with a bit of tape. Weigh both tube to the nearest mg. Make at least 4 injections of the mixture. To calculate the yield for each fraction, use the initial and final weights of each tube and follow the calculations on p.72 but do not forget include the fact that several injections were made.
All students are to circulate and observe all the separation experiments in progress.
Remember that the fractions collected by each group are to be run on the gas chromatograph. Report your data on the table outlined on the chalkboard so that the entire classs can evaluate and compare the data. Record all the data in your book once it is complete. In your report compare the separation methods using the data collected. Compare the total amount of liquid obtained from the separation to the initial amount of mixture.