Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Transcribed Image Text:16
Gnalytical
(C). Calibration of an automatic delivery pipette
Volume of deionized water "theoretically" delivered by the pipette.O00 ml
Temperature of water used in the pipette
23
°C
Density of water at the observed temperature (see table)C.9976 g/ml
Trial 1
Trial 2
Trial 3
Trial 4
Trial 5
Mass of Erlenmeyer plus
aliquot of H20 (~1 ml)
10,9859 1.9846
e 12.9836 13.9826 14.9828
Mass of Erlenmeyer plus
one less aliquot (tare mass) 9846
9.9845 10.9849
12.9836 13,982x
Mass of~1 ml water
delivered by pipette
LO014 0.9987
0.9990 0.999O LDO02E
1,001 1,001 L.003 ml
Volume of water delivered
L.004
1.001
by pipette (show calculation)
V=m/d
Average volume delivered by 1 ml pipette
0,99966
ml
(show calculations) 1.0014 + 0.9987+0.9990+0.9990+1.0002
Trial 1
Trial 2
Trial 3
Trial 4
Trial 5
Individual deviations from the mean
ml
2.
Average deviation from the mean (show calculation)
ml
Standard deviation from the mean (show calculation)
ml
Volume delivered by pipette
土
ml
Comment on your lab technique based on the volume delivered and its standard devation.
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