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Unformatted text preview: Experiment 4 Limiting and Excess Reagents Chemistry 1045L- Purpose: The purpose of this lab was to create a reaction while still practicing basic weighing and techniques. New instruments were implemented in this lab to broaden the scope of tools we can use. New instruments in this lab include the centrifuge and a dessicator. With these tools we were able to figure out excess and limiting reagents. Procedure: The procedure was followed according to this link: http://www.chem.fsu.edu/chemlab/chm1045lmanual/limiting/procedure.html . There were no changes in the procedure Data: Group Vol. KI (0.50M ) Masses of ppt in test tubes KI Test A 1.0mL 6.0mL .1080g .0870g .0792g .0998g ++ ++ ++ ++-- ---- -- B 2.0mL 5.0mL .2240g .1998g .2430g .1945g .2482g .1300g .1429g .2238g ++ ++ ++ ++-- ---- -- C 3.0mL 4.0mL .2881g .2975g .3200g .2996g .2828g .2254g .0077g .0302g-- ---- -- ++ + + ++ + + D 4.0mL 3.0mL .1041g .2088g .2379g .2170g .1742g .2127g-- ---- ++ + + ++ E 5.0mL 2.0mL .1580g .1667g .0707g .0695g .1067g .0948g .4518g .4975g....
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- Spring '11