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Mass Percent of Oxygen in Potassium Chlorate

Mass Percent of Oxygen in Potassium Chlorate. Chemistry Name________________ Experiment Number #7 Section_____Date _____ Mass Percent of Oxygen Name(s) of Lab Partner(s) In Potassium Chlorate. Objective. To calculate the mass percent of oxygen in potassium chlorate. Procedure.

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Mass Percent of Oxygen in Potassium Chlorate

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  1. Mass Percent of Oxygen in Potassium Chlorate

  2. Chemistry Name________________ Experiment Number #7 Section_____Date_____ Mass Percent of Oxygen Name(s) of Lab Partner(s) In Potassium Chlorate

  3. Objective • To calculate the mass percent of oxygen in potassium chlorate

  4. 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 • 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

  5. Data • Mass of test tube and catalyst ___ • Mass of test tube, catalyst and KClO3 ___ • Mass of test tube and products ___ • Observations (10)

  6. Calculations • Percent of oxygen in KClO3 (skip 6 lines)

  7. Actual percent of oxygen in KClO3 (skip 6 lines) • Percent error • Percent error = % in your gum – actual % X 100 = % actual %

  8. 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 2)

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