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Source of Data: names of students
Sample 1 is yours.
Sample 2 get data from another Team. **
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Our team
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Another team
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Data for BaCl2?yH2O
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Sample 1
g or moles
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Sample 2
g or moles
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(1) mass of a clean crucible
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21.090
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*21.090
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(2) mass of crucible and hydrated salt BaCl2?yH2O
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22.227
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*22.247
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(3) mass of hydrated salt BaCl2?yH2O
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1.129
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(4) a. mass after first heating
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22.050
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b. mass after second heating
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22.048
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*22.123
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c. mass after third heating
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22.047
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*22.120
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(5) mass of water lost
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(6) moles of water lost
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(7) mass of dehydrated salt BaCl2
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(8) moles of dehydrated salt BaCl2
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**Copy only data in boxes marked with *. Either 4b or 4c whichever is the last mass.
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Average (6) moles of water for Samples 1 and 2
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Average (8) moles of BaCl2 for Samples 1 and 2
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Show calculations for Lines 5, 6, 7, 8 & Averages neatly on other side of this page.
Use the Averages for Lines 6 and 8 in the calculations on page 65.
1.
Ratio of moles H2O produced to moles BaCl2 produced
2.
formula of BaCl2*yH2O ( round off above ratio)
3.
Experimental molar mass of BaCl2*yH2O:
4.
Balanced chemical equation (include phases of reactants and products):
WORKSHEET 3: FeC2O4?zH2O STOICHIOMETRY
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Source of Data: names of students
Sample 1 is yours.
Sample 2 get data from another Team. **
|
Our team
|
Another team
|
|
Data for FeC2O4?zH2O
|
Sample 1
g or moles
|
Sample 2
g or moles
|
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(1) mass of a clean crucible
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20.087
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*21.100
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(2) mass of crucible and hydrated salt FeC2O4?zH2O
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21.673
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*22.494
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(3) mass of hydrated salt FeC2O4?zH2O
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1.599
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1.394
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(4) a. mass after first heating
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20.772
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b. mass after second heating
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20.765
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*21.692
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c. mass after third heating
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20.761
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*21.684
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(5) mass of CO, CO2, and H2O lost [(2) minus (4)b or c]
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(6) mass of Fe2O3 [(4)b or c minus (1)]
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(7) moles of Fe2O3 [convert (6) mass to moles]
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(8) moles of FeC2O4?zH2O initially present ***
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Average (3) mass of FeC2O4?zH2O for Samples 1 & 2
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Average (8) moles of FeC2O4?zH2O for Samples 1 & 2
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**Copy only data in boxes marked with *.Either 4b or 4c whichever is the last mass
***moles ofFeC2O4?zH2Oinitially present can be determined by comparingFeC2O4?zH2OandFe2O3in the balanced chemical equation.
Show calculations for Lines 5, 6, 7, 8 & Averages neatly on other side of this page.
Use the Averages for Lines 3 and 8 in the calculations on page 69.
Experimental molar mass of FeC2O4*zH2O (use 3 and 8 from worksheet calculate the mass of one mole of FeC2O4*zH2O)
2
Formula of FeC2O4*zH2O (Show calculation)
3
balanced chemical equation (include phases of reactants and products)