1- Densities of Liquids and Solids

1- Densities of Liquids and Solids - Results and Discussion...

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Results and Discussion Purpose: To calculate the densities of an unknown solid and an unknown liquid in an accurate and precise way. The procedure was first tested on water to make sure it was correct, and in three trials of finding the density, it was determined to be 0.997 g/mL. The density of the unknown solid was calculated, using data from three experimental trials. Table 1: Determining the Density of the Unknown Solid Trial 1 Trial 2 Trial 3 Total Mass (Solid+Water) (g) 41.255 41.259 41.217 Mass of Solid (g) 18.396 18.398 18.396 Density of Water (g/mL) 0.997 0.997 0.997 Volume of Solid (mL) 2.072 2.070 2.110 Density of Solid (g/mL) 8.8789 8.888 8.718 The volumes were calculated with the formula: Total Mass = Mass of Solid + Density of Water * (25 mL-Volume of Solid) An example calculation follows, as shown with the data from Trial 1: (41.255 g) = (18.396 g) + (0.997 g/mL) * (25 mL – Volume of Solid) Volume of Solid = 2.072 mL Next, the density was calculated with the formula: Density = Mass / Volume An example calculation follows, also using data from Trial 1: Density = 18.396 g / 2.072 mL = 8.8789 g/mL

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