Density Determination

Topics: Density, Volume, Liquid Pages: 3 (564 words) Published: January 15, 2013
Cassidy Bennett

Density Determination

Objective: To find the density of materials using two methods to calculate volume, and calculate percent error of the results.

Materials:
-Graduated cylinder-Vernier Caliper-Cube
-Balance-Water-Beaker
-Cylinder-Unknown Liquid

Procedure:

A. Density of liquids
Measure the mass of a graduated cylinder to the nearest 0.01g. Add water to the cylinder, calculate the new mass of the cylinder and water. Record the volume of water to the nearest 0.1 mL. Repeat steps 1-2 for additional liquids.

B. Density of solids using water displacement
1. Obtain a solid object and measure its mass to the nearest 0.01 g. 2. Fill a graduated cylinder about half full and read the volume to the nearest 0.1 mL. 3. Carefully place the solid in the water and record the new volume of water to the nearest 0.1 mL. 4. Repeat steps 1-3 for additional solids.

C. Density of solids using calipers
1. Obtain a solid object and measure its mass to the nearest .01 g. 2. Use calipers to measure the necessary dimensions to calculate volume. Record the measurements to the nearest 0.01 cm. 3. Repeat steps 1-2 for additional solids.

Calculations:
1. Volume of a solid using water displacement
Final volume of water - Initial volume of water = Volume of a solid a. Cube- 59mL – 40mL = 18mL
b. Cylinder- 14.5mL – 10mL = 4.5mL
c. Sphere- 6.4mL – 6mL = 0.4mL
2. Volume of solids using vernier calipers.
a. Cube- l * w * h
2.5 * 2.5 * 2.5 = 15.63

b. Cylinder- 3.14 * r² * h
3.14 * .95 * 3.57 = 10.12

Tables:
(mass of liquids)
Liquid | Empty Cylinder (g) | Cylinder w/ Liquid (g) | Volume (mL) | Density (g/mL) | % Error | Water (faucet) | 41.53 g | 51.79 g | 10.26 mL | 5.04 g/mL | 4.04% | Isopropyl | 41.53 g | 49.68 g | 8.15 mL | 6.1 g/mL | 6.80% | Vegetable Oil | 41.53 g | 50.50 g | 8.97 mL | 5.62 g/mL | 5.11% |...
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