CH  120
Lab #1: Density
Andrew Buettner
Lab #1 Result tables:
pr^{2} Method Displacement
Bar 
Mass 
Volume 
Density 
Volume 
Density 
1 
17.817g 
6.27cm^{3} 
2.84g/cm^{3} 
5.3 cm^{3} 
3.3g/cm^{3} 
2 
6.537g 
2.26cm^{3} 
2.89g/cm^{3} 
2.4cm^{3} 
2.7cm^{3} 
Lab #1 Question:
Q: Which method is more accurate in determining the volume and density of a substance  pr^{2} method or displacement method?
A: In the case of this lab the pr2 method is more accurate as the results contain more significant digits.
Lab #2c Results:
% NaCl Content with water (H_{2}0)

4% 
8% 
12% 
16% 
Unknown 
Density 
1.02 g/cm^{3} 
1.05 g/cm^{3} 
1.09 g/cm^{3} 
1.11 g/cm^{3} 
1.04g/cm^{3} 
Lab #2c Question:
Q: What is the approximate NaCl percent content in the unknown solution?
A: The approximate content is 6.54%