# Calculating Densities

Phill Sweeden
Calculating Density
9/10/14

I. Purpose

By the end of this lab the student can identify the density of two various substances, using the mass, volume, and density of a substance.

II. Safety

Participant must be wearing goggles and a apron. Be careful to avoid dampening or consuming the lead.

III. Prelab Questions

1. Calculate the slope of the line in the graph above. Use the rise over run method. If you donâ€™t know how ask a friend or look it up. Clearly show work for the calculation and include units in your answer.

Slope= y2-y1     5.4g-1.2g   4.2g
------- ------- =             -----   =   1.05
x2-x1 2.5ml-.5ml           2ml

2. The slope of this line represents the density of the substance.

IV. Procedures

1. Collect the samples of lead and brass and do not dampen these samples.
2. Acquire the mass of the beaker, while its empty. When that task is completed carefully insert the lead into the beaker. And finally collect the new mass.
3. To acquire the volume of the led use the water displacement method. With tap water fill the graduated cylinder halfway and record the volume. pour the metal sample into the beaker. If any metal or water happens to be spilt you must restart at step two. And record the final volume.

V. Data and Observations

Group Number | Aluminum Mass (g) | Aluminum volume (ml) | Steel mass (g) | Steel volume (ml) |
1 | 7.05 | 4.1 | 11.09 | 1.2 |
2 | 4.30 | 1.5 | 11.00 | 1.5 |
3 | 38.10 | 14 | 88.90 | 12.0 |
4 | 2.89 | 1.2 | 5.08 | 0.6 |
5 | 18.63 | 6.0 | 35.77 | 5.0 |
6 | 19.63 | 9.0 | 25.70 | 5.0 |
7 | 57.41 | 21.0 | 112.70 | 25.0 |
8 | 56.56 | 4.0 | 67.35 | 3.0 |
9 | No Data | No Data | No Data | No Data |
10 | No Data | No Data | No Data | No Data |
11 | 16.55 | 12.0 | 25.15 | 7.0 |

VI. Calculations

1. Calculate the density of your samples by using your mass and...