Chem Lab 2 Report

Cydney Kessler Date of Experiment June 13, 2015

Report Submitted: June 15, 2015
Title: Laboratory Techniques and Measurements
Purpose: In this experiment I will determine the mass, density, volume, lengths and temperatures of different objects and liquids to help me better understand the importance of Chemistry and how Chemistry plays a big role in our everyday lives.
Procedure: In the experiment, I use devices such as a ruler, beakers, flasks, a scale and cylinders to measure the values of each object and liquid.

DATA TABLE 1: Length Measurements.
Object
Length (cm)
Length (mm)
Length (m)
CD or DVD
12 cm
120 mm
.12 m
Key
5 cm
50 mm
0.05 m
Spoon
15.2 cm
152 mm
0.152 m
Fork
19.2 cm
192 mm
0.192

DATA TABLE 2: Temperature Measurements
Water
Temperature (*C)
Temperature (*F)
Temperature (*K)
Hot from tap
44*C
111.2*F
317.1*K
Boiling
90*C
194*F
363.1*K
Boling for 5 minutes
96*C
204.8*F
369.1*K
Cold from tap
27*C
80.6*F
300.0*K
Ice Water- 1 minute
11*C
51.8*F
284.1*K
Ice Water- 5 minute
7*C
44.6*F
280.1*K

DATA TABLE 3: Mass Measurements.
Object
Estimated Mass (g)
Actual Mass (g)
Actual mass (kg)
Pen or Pencil
5g
5.3g
.0053kg
3 Pennies
7.5g
8.1g
.0081kg
1 Quarter
5.5g
5.7g
.0057kg
2 Quarters, 3 Dimes
18.8g
18.1g
.0181kg
4 Dimes, 5 Pennies
22.9g
22.7g
.0027kg
3 Quarters, 1 Dime, 5 Pennies
31.6g
33.0g
.033kg
Key
8.0g
8.3g
.0083kg
Key, Quarter, 4 Pennies
23.5g
25.2g
.0252kg

Questions
Water boils at 100*C at sea level. If the water in this experiment did not boil at 100*C, what could be reason? The boiling point varies due to atmospheric pressure. We are above sea level so the boiling point is higher.
While heating two different samples of water at sea level, one boils at 102*C, and one boils at 99.2*C. Calculate the percent error for each sample from the theoretical 100.0*C. 100(l102-100l/100=100(2l100) = 2% error. 100(l99.2-100l/100= 0.8/100)= (100(0.008)0.8% error

DATA TABLE 4: