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EXPERIMENT 1: DENSITY OF SOLIDS
The density of a substance is defined as its ma per unit volume.The most obvious way to determine the density of a solid is to weigh a sample of the solid and then find out the volume that the sample occupies.In this experiment, you will be supplied with variously shaped pieces of metal.You are asked to determine the density of each specimen and then, by comparison with a table of known densities, to identify the metal in each specimen.As shown in Table 1, density is a characteristic property.Table 1: Densities of Some Common Metals, g/cc
Aluminum2.7
Lead11.4
Magnesium1.8
Monel metal alloy8.9
Steel(Fe, 1% C)7.8
Tin7.3
Wood’s metal alloy9.7
Zinc7.1
PROCEDURE
Procedure(obtain)an unknown specimen from your instructor.Weigh the sample accurately on an analytical balance.Determine the volume of your specimen by measuring the appropriate dimensions.For example, for a cylindrical sample, measure the diameter and length of the cylinder.Calculate the volume of the sample.Determine the volume of your specimen directly by carefully sliding the specimen into a graduated cylinder containing a known volume of water.Make sure that no air bubbles are trapped.Note the total volume of the water and specimen.Repeat with another unknown as directed by your instructor.
