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Chemistry Lab Techniques and Measurement
Chemistry Lab Techniques and Measurement
Experiment #1
Laboratory Techniques and Measurement
PURPOSE
The purpose of this laboratory is to become familiar with measurements, materials, calculations, conversions, and procedures used in chemistry lab.
DATA
Length Measurements
Object
Centimeters
Millimeters
Pencil
10.5 cm
105 mm
Checkbook
14.2 cm
142 mm
Wallet
11.7 cm
117 mm
Warm Temperature Measurements
Temperature
Tap water
40 Celsius
Boiling water
97 Celsius
Cold Temperature Measurements
Temperature
Tap water
14 Celsius
Ice water
0 Celsius
Volume Measurements
Measurement
Test tube
10 mL
Pipet
4 mL
28 drops in 1 mL
Density Measurements
Measurement
16.5 g
25 mL cylinder with 5 mL water
21.5 g
5 mL water
5.00 g
Density of water
1.00 g/cc
Mass of 5mL alcohol
4.70g
Density of 5mL alcohol
0.94 g/cc
Mass of 5mL saturated solution and graduated cylinder
22.4 g
viii.
Mass of saturated solution
5.8 g
Density should be greater than density of water
Density of saturated solution
1.16 g/cc
Mass of bolt
8.00 g
Mass of half-full beaker
94.6 g
Volume of bolt
1.10 cc
xiii.
Density of bolt
7.27 g/cc
Mass of magnet
4.70 g
Volume of magnet
2.00 cc
Density of magnet
2.35 g/cc
xvii.
Dropped to bottom
4.50 cc
xviii.
Volume of magnet l/w/h
2.60 cm x 0.50 cm x 0.50 cm = 0.65 cc
Density of magnet
7.23 g/cc
The two density measurements are not similar at all. I believe the second measurement is more accurate, because the measurements are more exact. Holding the magnet on a string in the water depends greatly upon how low into the water you place it, how much your hand moves, and whether or not you accidentally hit the side.

A.What is the relationship between mL and cm3?
They are identical measurements of volume.
B. Everyone knows that water is supposed to boil at 100° C. Why did your water sample
boil at a different temperature?
Experimental error accounts for measurements being different from standard expectations.