seid sieW COMPOUND COMPOSITION REPORT and QUESTIONS 1 Mass o

seid sieW COMPOUND COMPOSITION REPORT and QUESTIONS 1. Mass of empty erucible and lid (Measure) 2. Mass of crucible, lid, and potassium chlorate1, before heating (Measure) .009 (Calculate) B1 3. Mass of potassium chlorate in crucible ar a ld, and product (Measure) after heating 5. Mass of product in crucible Calculate 6. Mass of oxygen (Calculate) 7. %of oxygen in potassium (Calculate) chlorate sample Show numerical setup --massofoxygen_ _ x 100) mass of potassium chlorate 8. OBSERVATIONS LA hauldoservec that when a Sustance hnded exger is lost and the suubstaun still hos around t same ms 5-5

Solution

1) Mass of empty crucible and lid =29.917 gm

2) Mass of empty crucible,lid and potassium chloride before heating =31.917 gm

3) Mass of potassium chloride in crucible =2.00 gm

4) Mass of empty crucible,lid and potassium chloride after heating =31.806 gm

5) Mass of product in crucible = (Mass of empty crucible,lid and potassium chloride after heating ) – (Mass of empty crucible and lid )

Mass of product in crucible = 31.806 - 29.917 =1.889 gm

6) Mass of oxygen = (Mass of empty crucible,lid and potassium chloride before heating ) –( Mass of empty crucible,lid and potassium chloride after heating )

Mass of oxygen = 31.917 - 31.806 =0.111 gm

Mass of oxygen =0.111 gm

7) % mass of oxygen in potassium chloride sample = (mass of oxygen ) / (mass of potassium chloride ) x 100

% mass of oxygen in potassium chloride sample = 0.111 / 2.00 x 100 = 5.55 %

% mass of oxygen in potassium chloride sample = 5.55 %