precisely the right time as to not let out any additional liquid. For this experiment, we chose to use a 10mL burette to measure the density of our unknown liquid because we found our mean densities to be more precise then when we used the 10mL pipette. We found it more accurate because the mean density we calculated was close to the true answer and precise because the densities we calculated were very close to each other. Overall, we think this experiment was a success based on our results. We found our results of our experiment to be extremely precise and accurate using both the pipette and burette. With our unknown, we discovered that with a greater volume, the results were more accurate than with only 5 mL. We could have improved our accuracy with the unknown by making sure we got the volume exactly at the line every time. Also, our accuracy could have been improved by using more tools to gather more data. We only
used a 10mL burette to measure the density of our unknown, when we should have used not only a 5mL burette but also used a 5mL and 10mL pipette. Bibliography: 1. D.C. Harris, Quantitative Chemical Analysis, 7 th Ed., W.H. Freeman and Company, pp. 13 (density), 22-28 (balances, volumetric flasks, burettes, pipettes), and 53-65 (statistics). 2. D.A. Skoog, et.al., Analytical Chemistry, 8 th Ed., Brooks/Cole-Thomson Learning, pp. 20-53, 90-94, 115-117, 125-127, 142-147, 81-83. 3.
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