Problem: How does the mass and volume help determine the density of known metal samples? Hypothesis: When comparing the density of Zn(zinc) and Cu(copper), you will find that Copper is more dense than Zinc. You can test this out by using the density formula D=m/v. Materials:
* 2 metals (options: zn, al, or cu)
* 3 samples of each metal (small, medium, and large)
* Scale/Balance
* Calculator
* Water
* Graduated Cylinder
Safety:
* Be prepared for your work in the laboratory.
* Read all procedures thoroughly before entering the lab and/or starting experiment.
* Be alert and proceed with caution at all times in the lab. Step by Step Procedure:
1. Wash hands with soap and water
2. Grab all materials and set them out
3. Pick one metal out of the two you have chosen to compare and get your three samples (small, medium, large)
4. Find the mass of each sample using a scale/balance and then find the volume (using a graduated cylinder filled with water and putting each sample in the filled graduated cylinder to determine the volume)
5. Create a data table and write all the information collected down
6. Repeat steps three-six with the second metal of your choice
7. On logger pro, plug in all needed information to make a graph for each metal. If you do not understand how to use the program or are having difficulty with it then ask your instructor
Analysis:
The Essay on Water Density And Boiling Point
Part A 1. Diameter of the test tube.1cm 2. Length of test tube.11.5cm 3. Volume of the test tube.9.032 4. Mass of the empty test tube.10.35g 5. Mass of the filled test tube.29.89g 6. Mass of liquid in test tube.19.54 7. Temperature of the water.22ºc Part B Aluminum Sinker 1. Mass of object.6.87g49.44g 2. Volume of the water in the graduated Cylinder after the addition of the object.17.5mL19mL 3. ...
Zinc
Sample Size| Small| Medium| Large|
Mass| 7.2g| 11.69g| 19.4g|
Volume| 2ml| 3ml| 4ml|
Copper
Sample Size| Small| Medium| Large|
Mass| 29.23g| 38.37g| 57.28g|
Volume| 4ml| 6ml| 8ml|
Calculations:
1. Zinc: Small: 7.2/2 = 3.6 Medium: 11.69/3 = 3.896 Large: 19.4/4 = 4.85 Copper: Small: 29.23/4 = 7.3075 Medium: 38.37/6 = 6.395 Large: 57.28/8=7.16 2. Average of Zinc: 3.6+3.896+4.85/3 = 4.115
Average of Copper: 7.3075+6.395+7.16/3 =6.954
3. The density of a metal with a bigger sample size is going to be a bigger number than a metal with a smaller sample size. A density of a metal with a bigger shape may or may not change because the shape doesn’t determine the density. 4. Zinc % Error = ǀ 4.115 – 7.13 ǀ x 100 = 311.5
7.13
Copper % Error = ǀ 6.954 – 8.96 ǀ x 100 = 595.4
8.96
In this lab the problem answered was how does the mass and the volume help determine the density of known metal samples. To find the density of known metal samples we used the mathematic formula D=m/v. To find the mass you put each sample of each metal onto a balance/scale and to find the volume you used a graduated cylinder filled with water up to 180mL and you then put each sample of each metal into the graduated cylinder. The amount the water rose was the volume of the metal sample. Copper,as said in the hypothesis was proven to have a greater density over Zinc
Conclusion:
In this experiment we found that the density of Zinc and Copper and can be determined by using the density formula and then compared with each other the results showed that Copper was a greater density. Something that could have been done better in this experiment is that we could have made sure there was an even amount of each sample for each metal. We could have also tested aluminum along with Copper and Zinc. In the end, however, Copper still would have the greater density.
