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Unformatted text preview: Densities of Liquids and Solids Experiment #1 Due Friday, 9/14/07 Purpose Design and perform an experiment to determine the densities of an unknown liquid and an unknown solid. The unknown solid and liquid densities must be determined in the most precise and accurate manner possible. Accuracy: how well a measured value conforms to the actual/standard value Precision: a.k.a. reproducibility; whether repeated measurements are similar Validity: dependent on both accuracy and precision Procedure SOLID 1. The mass of the unknown solid was determined on an electronic balance, and recorded. 2. 10.00 mL of H 2 O was decanted into a graduated cylinder, using a 10.00 mL micropipette. 3. The unknown solid was fully immersed in the graduated cylinder, and the change in volume measured by the equation v final v in itial = v = v solid . 4. The density of the solid was then calculated using the equation d = m/v . 5. Steps 1 4 were then repeated 2 more times, for a total of 3 t rials....
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- Fall '05