Lab #1 - Density of Solids and Liquids

Lab #1 - Density of Solids and Liquids - Results and...

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Results and Discussion The density of an unknown liquid was found using the difference method. First, the volume of the liquid was measured using the graduated cylinder. Then its mass was measured by finding the difference between the mass of the graduated cylinder with the liquid and the mass of the empty graduated cylinder. The density of the liquid was then calculated using the formula Density = Mass/Volume . The procedure was first tested on water for accuracy which has a known density of 1.00grams/milliliter. Three experimental trials were performed for each substance. Table 1: Mass, Volume, and Density Calculations for Water Trial # Mass of liquid with graduated cylinder(g) Mass of empty graduated cylinder(g) Mass of Liquid(g) Volume of Liquid(ml) Density of Liquid(g/ml) 1 81.485 69.513 11.972 12.4 0.965 2 81.661 69.534 12.127 12.4 0.978 3 81.446 69.618 11.828 12.3 0.962 Sample Density Calculation: D = M/V = 11.972/12.4 = 0.965g/ml Average Density (water) = (0.965+0.978+0.962)/3 = 0.968 grams/ milliliter accepted value - mean value Percent Error = x 100 accepted value 1.00(g/ml) – 0.968(g/ml) Percent Error = x 100 = 3.2 % 1.00 (g/ml) |0.968 - 0.965| + |0.968 - 0.978| + |0.968 - 0.962|
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