Density Laboratory                                              Name ______________________________

                                                                             Period ________ Date _________________

Purpose: To determine the density of several solids and liquids.

Procedure:

A. Ruler and balance- At each table there is a bag containing green colored metal bars. Measure the length, height and width of the rectangular bar in centimeters and measure its mass .
Then repeat the measurements for the cube.

B. Water displacement method

1.  Pour about 50 mL of water into the graduated cylinder. Record the volume of the water and the mass of water and graduated cylinder in the data table.

2. Add metal shot until the water goes up about 30 mL. Record the volume of the water and the metal and the mass of the water, the metal and the graduated cylinder in the data table.

3. Pour the metal shot into the filte to separate the metal from the water.

C. Density of a liquid

1.  Place a dry, empty 100 mL graduated cylinder on the triple beam balance and determine its mass. Record its mass on your data table.

2.  Pour about 10 mL of water into the graduated cylinder. Record the volume of the water and the mass of water and graduated cylinder in the data table.

3.  Add approximately 10 ml of water to the graduated cyinder. Record the volume of the water and the mass of water and cylinder cylinder in the data table.

4.  Repeat step 3 until you have a total of 8 measurements. Be careful not to exceed the limit of the graduated cylinder.

Data:

Trial	Volume of water (mL)	Mass of cylinder and water (g)
Empty	0
1
2
3
4
5
6
7
8

Shape	Length (cm)	Width (cm)	Height (cm)	Mass (g)
Rectangular
Cube

          A. Ruler and balance                                                     C. Density of Liquid

B. Water displacement method

Mass of water (g)

Mass of water and metal (g)

Volume of water(mL)

Volume water and metal (mL)

Calculations: Show your work include the units and use the correct number of sig figs.

1. Find the volume of the metal blocks.

A. Rectangle

B. Cube

2. Find the density of the metal blocks.

A. Rectangle                                                         B. Cube

3. Find the volume of the metal shot.

4. Find the mass of the metal shot

5. Find the density of the metal shot

6. Determining the density of water

1.  Using the information from the Data Table, plot your data on the paper provided.

2.  Draw one line that comes closest to all the data. Do not connect the dots, just draw one straight line that comes closest to the points

3.  Determine the slope of the line. Mark on the graph, the points you used to find the slope and show your work. Record this as the density of water.

Density of water from your line. _________

Name ________________________________________

Conclusion:

1. Was the rectangular piece of metal the same metal as the cube? Use you data to support your conclusion.

2. The metal shot has a density of 7.87 g/mL.

a. What was the relative error in yours experiment?

b. What was the percent error?

3. For your density of water

a. What was the relative error in yours experiment?

b. What was the percent error?