Purpose: To determine the density of (a) solid sample(s)and a liquid sample.

Materials:

electronic balance25 mL graduated cylinder50 mL beakerforceps

liquid samplesolid samplemetric rulerfunnel

Procedure:

Determine your own procedure for making the measurements necessary to find the density of both the solids and a sample of a liquid. List your procedures in a very elementary, step-by-step manner in the spaces provided below. Make sure your procedures are specific enough so that someone following your directions can get your results.

For Density of Solid ALabel on 1st solid = ______

1.

For Density of Solid B (Procedure should be written so that multiple size samples are measured)

Label on 2nd solid = ______

1.

For Density of Liquid: (Procedure should be written so that multiple size samples are measured)

1.

Data Collection:

Density Equation: ______

Solid SampleA Solid Sample B Liquid Sample

1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6

Average Density of solid: ______AverageDensity of solid: ______Average Density of liquid: ______

Graphing: Graph the measurements collected for determining the density of the liquid sample.

Error Analysis:

Accepted density of solid A:Accepted density of solid B: Accepted density of liquid:

Percent error (solid):Percent error (liquid): Percent error (liquid):

(Show your work)(Show your work) (Show your work)

Questions:

1. Explain (including numbers) how your calculated density compares with the accepted value for the densities of the substances used.

2. Review your procedure. What could have been done differently to decrease your percent error? (Answer even if you did everything

perfectly)

3. Student A determines the density of the solid by placing water in a graduated cylinder, making a volume measurement, and then

adding the solid to the cylinder. Adding the solid causes splashing, and some of the liquid remains on the side of the cylinder as

drops. Why is the density of the solid incorrect as a result of this procedure? Is the density too high or too low? Explain your answer.

4. Student B determines the density of water using a 50 mL beaker and anelectronic balance with a tare/zero

function. He adds water to the 25 mL mark on the beaker then masses the water and beaker. He then dumps

the water and repeats the procedure four times. Density is calculated by averaging. Why is the density of the

water incorrect as a result of this procedure? Is the density too high or too low? Explain your answer.