Question

Sample 2 97.79 g 102.95 g 101.15 g Sample 1 (a) Mass of 98.32 g crucible + lid (b) Mass of crucible, lid + 103.76 g KCIO3 (c) Mass of crucible, lid + 102.01g residue after 1st heating (d) Mass of crucible, lid + residue after 101.69 g 2nd heating (e) Mass of crucible, lid + 101.68 g residue after 3rd heating 101.05 g 101.01 g

Answer 1

Sample 0 Mass of cancible + hid 98.32g Mass of crucible, lid + kao 102.95g Mass of crucible, lid + residue after 1st heating 102.019 Mass of ancible, lid + residue after and heating 101.699 Mass of caucible, lid + residue after zed heating 101.68 gm Mass of KA O₂ = 102.95-98.32 = 4.63g Total mass lost due to heating (Mass of cancible, lidt residue after sed, heating) - (Mass of chucible, lid + Keloz) · 102.95 - 101.68 1.279 Mass of Orygen released - 1-279. Mars of all residue. 4.63 - 1.27 (Massof kelo)-Mass of a release 8.36g (Euperimente Mass percent of oxygen in kuloz : Mass of Oxygen 100:121, X100 - 27-42%. Mass of kilos

Theoretical Mass percent of oxygen : 3 (Mola mass of 2 x 100 molar mass of Kaloz Theo x 100 = 79.16% 122.55 Percent evios between average experimental value and theoretical value for mass percent of oxygen in kalo: (Theo-lep) x 100 39.16-27 42x700-29.97% Questions: 39.16. 0 Arg experimental mass percentage of orygen in kaloz is lower than theoretical value & error could be because of splattering of Kug out of the caucible during heating process Potassium Chlocate: kdls Potassium chlorite: Kelo, A smaller mass percent of Oxygen would be obtained if the mixture of the two of them is heated because Only Potassium chlorate would have given a higher mass percent of Oxygen.

3) Given: 36.55 gm sample of Potassium Chlorate @ 2 Kuo, → 2XU + 30s moles of kao mass of Kllo: molae mass 36.55 0.298 moles. 129.55 Moles of O2: moles of KUO3 x 3 moles of 02 2 moles of Kolo, A = 0.298 * 3 moles of 2 0.447 moles of mass of O2 = 0.447 moles of O2 x 32 9/moles & 14.304 g 02 mass of Potassium chloride residue theactically left Mass of sample (kao,) - Mass of O2 36.55 - 14.304 90.2469 ka