|
|
Lab WorkThe instructions for your lab exercise for this lesson are in your workbook. Briefly, you will prepare several solutions of a specific chemical at different concentrations. Report each measurement and the concentration of each solution in your data sheet. You will label one of your middle-concentration solutions with a code word, and it will be used by other student groups as an unknown. Calculate the concentration of each prepared solution based on your data. Measure the absorbance of each solution (at the appropriate wavelength), plot absorption vs. concentration, determine the validity of Beer's Law and create a calibration curve. You should use a computer graphing program, like Excel, to create your calibration curve. Obtain two unknown solutions (one class unknown and one solution prepared by another student) and measure the absorbance of each. Determine the concentration of the unknown solutions graphically and by calculation. You will need to turn in a formal lab report for this experiment.
E-mail instructor: Sue Eggling Clackamas Community College
|
