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The Composition of Potassium Chlorate
Part A: Mass Percent of Oxygen in Potassium Chlorate
Experimental Data
Sample 1
Sample 2
(a) Mass of crucible + lid
30. 2529
26. 140g
(b) Mass of crucible, lid + KCIO,
31. 133 9
27. 4709
(c) Mass of crucible, lid + residue after 1" heating
30. 7749
27.2619
(d) Mass of crucible, lid + residue after 2" heating
30. 7669
27.2359
(e) Mass of crucible, lid + residue after 3" heating
not needed to heat
not needed to heat
a third time
a third time
Data Analysis
. Use your data to determine the experimental mass percent of oxygen in KCIO,. Show your work clearly for
each step in the table below.
Sample 1
Sample 2
Mass of original KCIO, sample
Mass of KCI residue
Anisland s
Mass of Oxygen released
provided withicles
created upon hearing
Mass Percent of Oxygen in KCIO,
Average Mass Percent Oxygen
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