percent yield theoretical yield actual yield. theoretical yield the maximum amount of product that...
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Percent YieldTheoretical Yield
Actual Yield
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Theoretical Yield
• The maximum amount of product that can be formed from given amounts of reactants• The amount you should get in a
perfect world• Use equation and stoichiometry
to calculate this amount
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Actual Yield
• The amount of product that actually forms when a reaction is carried out in the lab
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Percent Yield
• A measure of the efficiency of a reaction carried out in the lab• The ratio of the actual yield to
the theoretical yieldPercent yield = actual yield x 100%
theoretical yield
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• Percent yield should not be greater than 100%• Often less than 100%–Rxns. don’t always go to
completion–Some product can be lost during
filtering or transferring–Reactants or products not
measured carefully
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When 84.8 g of iron(III) oxide reacts with an excess of carbon monoxide, iron is produced.
Fe2O3(s) + 3CO(g) 2Fe(s) + 3CO2(g)
What is the theoretical yield of iron?
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When 5.00 g of copper reacts with excess silver nitrate, silver metal and copper(II) nitrate are produced. What is the theoretical yield of silver in this reaction?
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If 50.0 g of silicon dioxide is heated with an excess of carbon, 27.9 g of silicon carbide is produced.
SiO2(g) + 3C(s) SiC(s) + 2CO(g)
What is the percent yield of this reaction?
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If 15.0 g of nitrogen reacts with 15.0 g of hydrogen, 10.5 g of ammonia is produced. What is the percent yield of this reaction?