1. Percent Yield
A batting average is a measure of how often a batter gets a hit as a percentage of how many times he tries.
In chemistry, the percent yield of a
reaction is the amount
of product made as
a percentage of how
much was attempted
to be made.
Print 1-3,5-7

2. 12.3
percent yield:
the efficiency of a reaction, or amount of product recovered as a percent of product intended.
A batting average is actually a percent yield.
A batting average is actually a percent yield.

3. the amount of product actually formed in the laboratory.
12.3
theoretical yield:
the maximum amount of product that could be formed from given amounts of reactants. (calculated yield)
actual yield:
the amount of product actually formed in the laboratory.

4. 12.9

5. 13.9 g CaO 12.9 1 mol CaCO3 100.09 g CaCO3 1 mol CaO 1 mol CaCO3
24.8 g CaCO3 x x x =
13.9 g CaO

6. 13.1 g CaO 13.9 g CaO x 100% = 94.2 % theoretical yield 13.9 g CaO
12.10
1 mol CaCO3
g CaCO3
1 mol CaO
1 mol CaCO3
56.08 g CaO
1 mol CaO
24.8 g CaCO3 x x x
theoretical yield =
13.9 g CaO
13.1 g CaO
13.9 g CaO
x 100% =
94.2 %

7. WHY? % yield is usually LESS than 100%
12.10
13.1 g CaO
13.9 g CaO
x 100% =
94.2 %
% yield is usually LESS than 100%
WHY?
Could it ever be MORE than 100%?

8. 1. The theoretical yield is also called the percent yield actual yield
Quick Quiz!
1. The theoretical yield is also called the
percent yield
actual yield
calculated yield
experimental yield

9. Quick Quiz.
2. Octane is burned in following equation:
2 C8H O2  16 CO H2O
What is the percent yield if 14.6 g of CO2 are recovered when 5.00 g of C8H18 are combusted?
106%
94.8%
34.2%
62.5%