Balancing
Name for unbalanced chemical equations
Skeleton Equations
How many mole to mole ratios will we have in this equation?
2C2H6 + 7O2 --> 4CO2 + 6H20
12 total ratios
Units for molar mass
grams P.T/ 1 mol
Molar mass for Iron Oxide?
~159.6 g/mol
Amount of product obtained from the experiment
Actual Yield
Coefficients in balanced equation....
Write out all mole to mole ratios for the following equation:
N2+O2 --> 2NO
1molN2/1molO2
1molN2/2molNO
1molO2/1molN2
1molO2/2mol NO
2mol NO/1mol N2
2 mol NO/1 mol O2
In the reaction
2Al + 3Cl2 --> 2AlCl3
How many grams of aluminum chloride are produced from 4 moles of aluminum?
533.5 grams
Given 70 grams of O2, how many moles of water are produced?
2H2 + O2 --> 2H2O
78.75 grams of water
Max amount of product that can be produced from the reaction based on the balanced chemical equation.
Theoretical Yield
Balance the following equations
__H2 + ___O2 -> ___H20
2,1,2
Given 0.5 moles of O2, how many moles of KClO3 are used?
2KClO3 --> 2KCl + 3O2
0.33 mol KClO3
How many grams of carbon dioxide (CO2) will be produced when 12.0 moles of Octane are burned?
2C8H18 + 25O2 --> 18H2O + 16CO2
4224 grams
Calculate the mass of Fe2(SO4)3
394.7 g/mol
Tells us how efficient a reaction is
Percent Yield
Balance the following equation:
___Mg + ___Cl2 --> ___MgCl2
1,1,1
4 Fe + 3O2 --> 2Fe2O3
Given 8 moles of Fe, how many moles of Iron oxide (Fe2O3) will be produced?
4 moles Fe2O3
C + O2 --> CO2
How many grams of carbon dioxide are produced from 6 moles of carbon?
264 g CO2
2Fe2O3 + 3C --> 4 Fe + 3CO2
How many grams of CO2 will be produced if 12 grams of carbon are used?
44g CO2
Michelle used stoichiometry to predict that a chemical reaction would produce 14.56 g of aluminum chloride. After the reaction was completed, 14. 12g of aluminum chloride were produced. What was the percent yield of this reaction? Round to the nearest whole number
97%
___NH3 + ___O2 --> ___NO + ___H20
4,5,4,6
How many moles of carbon dioxide (CO2) will be produced when 12.0 moles of Octane are burned?
2C8H18 + 25O2 --> 18H2O + 16CO2
96 moles of CO2
For the reaction:
2K + Cl2 --> 2KCl
How many grams of potassium chloride are produced from 5 moles of chlorine gas?
745.5 grams KCl
2FeCl2 + 3H2SO4 --> Fe2(SO4)3 + HCl
If 30 grams of sulfuric acid are used, how many grams of iron sulfate are produced?
40.3 grams iron sulfate
Heather uses stoichiometry to predict that 24.61g of Chlorine gas will be formed from the decomposition of NaCl. After the reaction occurred, Heather measured the chlorine gas that was produced. She measured 23.76g of chlorine gas (Cl2). What was the percent yield of Heather’s experiment? Round to the nearest 10th
96.5%