CH - 120

Lab #1: Density

Andrew Buettner




Lab #1 Result tables:


pr2 Method Displacement

Bar

Mass

Volume

Density

Volume

Density

1

17.817g

6.27cm3

2.84g/cm3

5.3 cm3

3.3g/cm3

2

6.537g

2.26cm3

2.89g/cm3

2.4cm3

2.7cm3


Lab #1 Question:


Q: Which method is more accurate in determining the volume and density of a substance - pr2 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 (H20)


4%

8%

12%

16%

Unknown

Density

1.02 g/cm3

1.05 g/cm3

1.09 g/cm3

1.11 g/cm3

1.04g/cm3



Lab #2c Graph:





Lab #2c Question:


Q: What is the approximate NaCl percent content in the unknown solution?

A: The approximate content is 6.54%