Question

OBJECTIVE: Given a sample containing potassium chlorate and potassium chloride, be able to determine the percent composition of the mixture. DATA SHEET 1. Mass of test tube + MnO2. 30.5500 g 2. Mass of test tube + MnO2 + KCl + KClO3. 31.5575 g 3. Mass of test tube and reaction product a. after first heating 31.2737 g b. after second heating 31.2711 g c. after third heating not required Constant mass 70% CALCULATIONS AND RESULTS 4. Mass of KCl + KClO3 1.0075 g 31.5575 - 30.5500 = 1.0075 g 5. Mass of O2 released 0.2864 g 31.5575 - 31.2711 = 0.2864 g 6. Moles of O2 released 0.00895 moles 2 x 16 = 32 g/mol 0.2864 / 32 = 0.00895 mol

          OBJECTIVE:
Given a sample containing potassium chlorate and potassium chloride, be able to determine the percent composition of the mixture.

DATA SHEET

1. Mass of test tube + MnO2. 30.5500 g
2. Mass of test tube + MnO2 + KCl + KClO3. 31.5575 g
3. Mass of test tube and reaction product
a. after first heating 31.2737 g
b. after second heating 31.2711 g
c. after third heating not required
Constant mass 70%

CALCULATIONS AND RESULTS

4. Mass of KCl + KClO3 1.0075 g
31.5575 - 30.5500
= 1.0075 g
5. Mass of O2 released 0.2864 g
31.5575 - 31.2711
= 0.2864 g
6. Moles of O2 released 0.00895 moles
2 x 16 = 32 g/mol
0.2864 / 32 = 0.00895 mol

OBJECTIVE:
Given a sample containing potassium chlorate and potassium chloride, be able to determine the percent composition of the mixture.

DATA SHEET

1. Mass of test tube + MnO2. 30.5500 g
2. Mass of test tube + MnO2 + KCl + KClO3. 31.5575 g
3. Mass of test tube and reaction product
a. after first heating 31.2737 g
b. after second heating 31.2711 g
c. after third heating not required
Constant mass 70%

CALCULATIONS AND RESULTS

4. Mass of KCl + KClO3 1.0075 g
31.5575 - 30.5500
= 1.0075 g
5. Mass of O2 released 0.2864 g
31.5575 - 31.2711
= 0.2864 g
6. Moles of O2 released 0.00895 moles
2 x 16 = 32 g/mol
0.2864 / 32 = 0.00895 mol

Added by Lindsey O.

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