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Mass Percent of Oxygen in Potassium Chlorate
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Chemistry Name________________ Block_____Date_____ Mass Percent of Oxygen Name(s) of Lab Partner(s) In Potassium Chlorate
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Objective To calculate the mass percent of oxygen in potassium chlorate
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Procedure Add a small amount of catalyst to a test tube
Record the mass of the test tube and catalyst Put 2 scoops of KClO3 in test tube and mass again and mix Heat the test tube with a burner until no more oxygen is seen
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Procedure, con Continue to heat another 2-3 minutes
Record your observations- allow to cool Mass the test tube and products Calculate the percent oxygen in potassium chlorate
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Data Mass of test tube and catalyst ___
Mass of test tube, catalyst and KClO3 ___ Mass of test tube and products ___ Observations (you must make)
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Calculations Percent of oxygen in KClO3 (skip 6 lines)
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Actual percent of oxygen in KClO3 (skip 6 lines)
Percent error Percent error = % in your exp – actual % X = % actual %
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Conclusion The mass percent of oxygen in potassium chlorate according to my lab was ________. The actual value using the gram formula weight is ___________. My percent error is _________. Reasons for error include… (list 3 + two more sentences about lab)
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