Experiment 1-Accuracy and Precision

Experiment 1-Accuracy and Precision - Laboratory Report...

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Analytical Chemistry Laboratory – Fall 2010 Name: Brittany Adams Krista Hawley Kelley Krueger Date(s) of Experiment: August 31, 2010 Total Points Possible – 100 pts . Objectives: (3 points) 1) Introduce several of the tools, techniques, and skills necessary for work in the analytical chemistry laboratory. 2) Introduce the concept of density and how to determine density. 3) Demonstrate methods and calculations for determining accuracy and precision using several series of density data. Balanced Chemical Equation: (3 points) 2Na + (aq) + SO 4 -2 (aq) NaSO 4 Data: (21 points) Each student’s wt. of weighing bottle (3 pts.) 11.5102 g, 11.5104 g, 11.5102 g, 11.5102 g Wt. Na 2 SO 4 calculated for assigned sodium sulfate solution (1 pt.) - 7.10 g (Show calculation in Calculations Section) Wt. of Na 2 SO 4 actually used (1 pt.) - 7.12 84 g (Show calculation in Calculations Section) Volume of Na 2 SO 4 solution (1 pt.) - 250 ml 5.00 ml Pipette (3 pts.) Replicate Sample + Vial, g. Empty Vial, g. Sample Wt., g. Density, g/ml 1 16.4 153 g 11.5 414 g 4.87 39 g 0.97 g/ml 2 16.5 403 g 11.5 171 g 5.02 32 g 1.00 g/ml 3 16.6 040 g 11.5 230 g 5.08 10 g 1.02 g/ml 4 16.2
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Experiment 1-Accuracy and Precision - Laboratory Report...

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