1. Yield ?
Yield-noun: 
Performance, yield, efficiency, output, production, product, put.
Harvest, crop, harvesting, picking, yield
Yield-verb: 
produce, yield, result in, generate, bring about, develop
yield, give way, make way, give the right of way
deliver, give, hand, submit, hand over, yield

2. 5 pounds x 10 = 50 pounds (must be collected)
If you have a plantation of tomatoes (10 m2) and you estimate to collect 5 pounds of tomatoes per m2. If you actually collect 35 pounds of tomatoes. What is the percent yield of the crop (production)?
5 pounds x 10 = 50 pounds (must be collected)
Theoretical yield
Actual yield = 35 pounds =
Actual yield =
70 %
X =
% yield
Theoretical yield

3. Theoretical Yield:
Is the maximum amount of product that can be produced from a given amount of reactant (calculated from the balanced equation).
Actual Yield:
Is the amount of product actually produced when a chemical reaction is carried out (experimental data).
Percent Yield:
Is the ratio of the actual yield to the theoretical yield expressed as a percent.

4. Percent Yield:
Actual Yield
% Yield =
X 100
Theoretical Yield

5. Calculate the percent yield of the reaction if
Examples:
Calculate the percent yield of the reaction if
4.8 mol of Al (s) produce 2.1 mol of Al2O3.
4 Al (s) + 3 O2 (g) → 2 Al2O3 (s)
Actual yield = 2.1 mol Al2O3(s)
Theoretical yield:
4.8 mol
x mol
4 mol
2 mol =
X =
2.4 mol Al2O3
% yield =
x 100 =
x 100
% yield =
87.5 %

6. Percent Yield (Example):
2) If 80 g of sodium react with chlorine giving
190 g of salt. Calculate the percent yield of the
reaction Na(s) + Cl2(g) → 2 NaCl (s)
Actual yield = 190 g NaCl(s)
Theoretical yield:
80 g
x g
2(23) g
2(58.5) g =
X =
203.5 g NaCl
% yield =
x 100 =
x 100
% yield =
93.4 %

7. Percent Yield (Example):
3) If the theoretical yield of a reaction is 35.0 g of product
& the % yield is 95 %. How many grams were actually
produced?
% yield =
x 100
95 % =
x 100
X =
Actual yield =
33.25 g