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Unformatted text preview: Giselle Zornberg Ut eid: gzz57 Exercise #1-Analysis Due 09/13/07 1. a. %error of mean = |(calc. avg. volume) 60 mL| X 100% 60 mL %error of mean = |56.548125 60mL| X 100% 60 mL %error of mean for 60mL volumes of water = -5.753% b. %error of mean = |(calc. avg. volume) 4 mL| X 100% 4 mL %error of mean = |4.4022 4mL| X 100% 4mL %error of mean for 4mL volumes of water= 10.056% 2. a. Density of Dark Blue Solution = 1.12 g/mL V = 250L X 1mL__ = 0.250mL 10^3L D = m/v m = Dv m = (1.12 g/mL)(0.250mL) m = 0.280g b. Density of Dark Blue Solution = 1.12 g/mL V = 50L X 1mL__ = 0.05mL 10^3L D = m/v m = Dv m = (1.12 g/mL)(0.05mL) m = 0.056g 3. a. Because automatic pipetters are equipped with pipet pumps that are made to measure small volumes of liquid, calibrating the automatic pipette would not be very meaningful because of the accuracy already obtained by using the automatic pipetter. b.The analytical balance could be used to calibrate the automatic pipetters accurately because b....
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This note was uploaded on 03/20/2008 for the course BIO 205L taught by Professor Hanson during the Fall '07 term at University of Texas at Austin.
- Fall '07
- molecular biology