NAME: HIEP TON
October 6, 2014
LAB 1 MEASUREMENTS, SIGNIFICANT FIGURES and GRAPHING
OBJECTIVE:
•
•
•
•
•
To become familiar with some common general chemistry laboratory equipment, usage & limitations.
To learn the difference between precision and accuracy.
To learn about types of errors.
To learn how to determine or estimate uncertainties in measurements.
To learn the rules of significant figures and apply them.
DATA and REPORT:
Information About Some Glassware Used in Chemistry
Temperature at which
the glassware is
calibrated
To contain (TC)
or To deliver
(TD)
21.5°C
TC
graduated
25 mL
± 2 mL
25 mL buret
21.5°C
TD
graduated
0.1 mL
± 0.02 mL
10 mL
volumetric
pipet
21.5°C
TD
fixed
volume
One mark only
10 mL
± 2 mL
100 mL
volumetric
flash
21.5°C
TC
fixed
volume
One mark only
100 mL
± 0.15 mL
100 mL
graduated
cylinder
21.5°C
TC
graduated
1 mL
± 0.02 mL
10 graduated
cylinder
21.5°C
TC
graduated
0.1 mL
± 0.02 mL
TD
graduated
0.1 mL
± 0.1 mL
Measuring
Device
250 mL
beaker
10 mL
graduated
pipet
Graduated
or fixed
volume
For graduated
only, smallest
scale division
The (precision)
uncertainty
(± x)
21.5°C
Volume of water in following devices to correct significant figures (include the uncertainty)
a. 100 mL volumetric flask filled exactly to the calibration mark
b. 250 mL beaker
c. 100 mL graduated cylinder
d. 10 mL graduated cylinder
100 ± 0.16 mL
179 ± 2 mL
84.5 ± 0.02 mL
7.6 ± 0.02 mL
Page 1 of 2
NAME: HIEP TON
October 6, 2014
GRAPHING :
Data table of mass of beaker and water versus volume
Temperature of water: 20.0°C
Total volume of
water added (mL)
Total mass of beaker
plus water (g)
5.8
84.6
10.0
88.2
20.7
99.1
25.8
103.5
Graph of mass of beaker and water versus volume (based on Data Table)
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