Experiment 1 - Density of Liquids and Solids
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Experiment 1 - Density of Liquids and Solids
Goal: To accurately determine the density of an unknown liquid and an unknown solid.
Density = mass volume
units are: g or g where 1 mL = 1 cm3 mL cm3
To properly measure density, we need a container whose volume is known to a high degree of accuracy. This container is known as a pychnometer. For us, the pychnometer will be an Erlenmeyer flask and stopper.
Measurements and Calculations:
A. Calibration of the Pychnometer We will rely on the fact that the density of water has been measured countless times and every possible temperature. That is to say, we know the density of water and can use its value, and the mass of water to determine the volume of any container. Thus, we measure the mass of the dry pychnometer, then fill it completely with water, and measure the mass again.
measurements: mass of dry flask and stopper = 32.06 g mass of flask, stopper and water = 56.88 g
calculations: mass of water = (mass of flask, stopper and water) - (mass of flask and stopper) mass of water = 56.88 g - 32.06 g = 24.82 g
volume of flask = mass of water density of water ................
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