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chem 207 Lab writeup 1

chem 207 Lab writeup 1 - Density of Liquids and Solids...

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Density of Liquids and Solids
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Results and Discussion: This experiment was done to determine the density of an unknown solid #6, and an unknown liquid #3. These densities were then compared to tables 1.1 and 1.2 in the lab manual to determine their identity. Solid #6 The mass of solid #6 was found first using the balance. Three trials were done. The average was taken. Table 1: Mass of solid #6 Trial 1 Trial 2 Trial 3 3.636g 3.635g 3.635g 3.636+3.635+3.635 = 3.635 Average mass: 3.635g Next the volume was found by using a graduated cylinder and water. The solid was dropped into the water and the water displaced was measured to find the solid’s volume. Three trials were done. Table 2: Volume of solid #6 Trial 1 Trial 2 Trial 3 10ml-12.5ml 8ml-10.5ml 13ml-15.5ml 2.5 ml displaced 2.5ml displaced 2.5ml displaced Therefore the volume of solid #6 was 2.5ml Using the formula: Density = Mass/Volume, the density of solid 6 can be found. Density = 3.635g/2.5ml = 1.5g/ml The chart 1.1 in the lab manual has rubidium with a density of 1.5g/ml, so therefore our Solid #6 must be Rubidium.
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