2CLabManual201303

E you will make a total of sixteen spectroscopic

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Unformatted text preview: ill prepare eight solutions with known concentrations--four each of both the red and green solutes--and measure their absorbances at the wavelengths of the two absorption maxima you determined in Part II above; i.e., you will make a total of sixteen spectroscopic measurements. 1. Fill one 50 mL buret with the cold, green chloro solution and another one with the solution of its red aquation product. Evenly splitting up the workload within the partnership, dispense four measured 3.0 ± 0.2 mL portions of each of these solutions into separate clean test tubes. This entails numerous buret readings, but in order to maintain a reasonable degree of precision here you really do have to make them all. As always, immediately store the "green" tubes in the ice/water bath. 2. To the four "red" test tubes in turn use the 50 mL buret to add measured volumes of the acidic solvent as follows: 2.0 ± 0.2; 3.0 ± 0.2; 4.0 ± 0.2 and 5.0± 0.2 mL. (You should now have four tubes containing accurately measured total volumes...
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This note was uploaded on 04/09/2013 for the course CHE CHE 2C taught by Professor Nasiri during the Spring '07 term at UC Davis.

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