# Subtract average from each value o 002 001 0001

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Subtract average from each value o -.002, .001, 0.001 Square each number o .000004, .000001, .000001 Add squared numbers o .000006 Divide by N-1 o .000003 Find the square root o .0017 Volume= ( massof water ) ( density of water ) = ( 9.256 ) ( .997325 ) = 9.281
Jeff Hunter Section: 004 Lab 1. Volumetric Glassware Calibration Discussion: The data above is to be expected, but there were some sources of error during the 50 mL buret tolerance calculations. A negative tolerance is a sign that measurements and buret dispensing was not done accurately. For future experimentation a slower pace could correct these issues. The other data sets have a reasonable standard deviation and calculated dispense volume. Conclusion: Overall the goal of this experiment was successful. Various laboratory tools were used to generate data sets that were then applied for calculations. These calculations were a standard deviation, an average mass, a set of tolerances, and a set of volumes. The equations used in this lab will be applicable in all future labs and in any scientific career. The techniques learned will also prove to be invaluable in future experimentation. The buret, pipette, and analytical balance are laboratory staples that will be used repetitively by most researchers.