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Chemistry Lab Report

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Lab Report
Determination of Density of Aluminum
January 25, 2011

Tinisha Hallback (Chem 1211L,Tues. 7:00-9:15pm)
Partners: Henrietta Mofoke & Shante Blackburn

Objective: To determine the Density of aluminum by water displacement and geometric formulas.

Procedure: The relationship between the mass of an object and its volume is called density. The mass and volume of aluminum was determined. The density was calculated by dividing the mass of the piece aluminum by its volume.

Results/Discussion
Table 1 Density of aluminum based on dimensions

Trial 1
Mass of aluminum sample 17.266 g
Dimensions of aluminum sample (length) 5 cm (diameter) 1.2 cm
Volume of aluminum sample 5.655 cm3
Density of aluminum sample 3.028g/cm3

Trial 2
Mass of aluminum 17.110g
Dimensions of aluminum sample (length) 5 cm (diameter) 1.2 cm
Volume of aluminum sample 5.655 cm3
Density of aluminum sample 3.026 g/cm3

Table 2 Density of aluminum based displacement of water

Trial 1
Mass of aluminum sample 17.1240 g
Final volume of the water in the buret 15 ml
Initial volume of the water in the buret 8.5 ml
Volume of water dispensed from the buret 5.655 cm3
Volume of water level on graduated cylinder N/A
Volume of aluminum sample 6.5 ml
Density of aluminum sample 2.634 g/cm3

Trial 2
Mass of aluminum sample 17.1112g
Final volume of the water in the buret 18 ml
initial Volume of the water in the buret 11.5 ml
Volume of water dispensed from the buret 5.655 cm3
Volume of water level on graduated cylinder N/A
Volume of aluminum sample 6.5 ml
Density of aluminum sample 2.6324 g/cm3

Avg density: 2.6332 g/cm3
Percent error is 12%

Calculations
D = M/V   17.1240/5.6555 = 3.027
Avg density: 3.028 + 3.026 / 2 = 3.027
Volume:   3.14159 x (1.2/2)2 x 5= 18.84954
Percent Value: 2.7-3.027/2.7 x 100 = -12.1 (Therical Value 2.7)
2.7 – 2.633/2.7 x 100

Conclusion: The density of aluminum was determined to be 2.6332 g/cm3. The actual density is 2.634 g/cm3 which...

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