Question

Composition of Potassium Chlorate

REPORT FOR EXPERIMENT 9 Composition of Potassium Chlorate A. Determining Percentage Composition 1. Mass of crucible + cover Sample 1 2302 2. Mass of crucible + cover + sample before heating 3. Mass of crucible +covert residue after 1758 14.29 20,567 1217 19 16 15.9% heating 4. Mass of crucible +cover+residue after 2- heating 5. Mass of crucible + cover + residue after 3 heating if necessary) 6. Mass of original sample Show p le I calculations 7. Mass lost (total) during heating Show sample calculation setup: 8. Final mass of residue Show sample I calculation setup: 9. Experimental percent oxygen in sample KCIO, Show sample I calculation setup 10. Experimental percent KCl in sample KCIO, Show sample 1 calculation setup: 11. Theoretical percent oxygen in KCIO, Show calculation setup: 12. Theoretical percent KCl in KCIO Show calculation setup: 13. Percent error in experimental % oxygen determination Show sample I calculation setup:

Answer 1

Mass of crecible + cover - 17.58 g of creible + cover + sample before heating & mass of klO₃ = 2.96g = 20.54g Ag 13) A Mass of crucible + cover & residue after heating a 19.16g mass of residue left after aealing - 1.58 g mass of kalo lost after heating = (2.96 - 1.58) (kce) reaction (0,) - 1.389 as 26403 6 2K ut 302 g) 6. Mass of Original sample 2.96g. 7. Total mass lost during heating = 1.38g 8 final mass of residue = 1.58 g 9. Experimental % 0 in the sample kao 2 1.38 x 100 = 46.6% 2.96 lo. Experimental ske in sample = 1.58 x 100 = 53.37% 2.96 11 Theoretical t o in kuo₂ = 39.1% 12. Theoretical t kel in KUO₂ = 60.81% 3. Percent error in 4.0 ty = Alexperimental 0x100 - Theoretical o 215 x 100 - 19.)

for set II reading 6. (17.17 14.29) = 2.88 g 7. 116.97 - 14.29) > 1.209 - 1668 g 9. 41.6% 58.3% 39.1 12 13. GO. 80% 6.3 %