Chemistry Formula
Percent Yield Formula
Compares the measured product yield with the theoretical yield.
Formula Summary
Percent Yield
Compares the measured product yield with the theoretical yield.
- Category
- Chemistry
- Equation
- % yield = actual ÷ theoretical × 100
- Calculator
- Use Percent Yield Calculator →
Equation
% yield = actual ÷ theoretical × 100
Variables
- actual = measured yield
- theoretical = predicted maximum yield
How to Use This Formula
- Identify the known values from the problem statement.
- Convert all values into compatible units.
- Substitute the values into the equation and calculate the result.
- Check that the final answer has the correct unit and meaning.
Explanation
Percent yield measures the efficiency of a chemical reaction by comparing the actual amount of product obtained with the maximum theoretical amount predicted by calculations.
Worked Example
If a reaction theoretically produces 10 g of product but the experiment produces 8 g, the percent yield is (8 ÷ 10) × 100 = 80%.
Common Mistakes
- Swapping actual yield and theoretical yield values.
- Using inconsistent measurement units.
- Expecting percent yield to always equal 100%.
Applications
- Evaluating efficiency of chemical reactions.
- Laboratory experiment analysis.
- Industrial chemical production calculations.
Related Formulas
Solution Dilution
C₁V₁ = C₂V₂
Relates concentration and volume before and after dilution.
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