Percent Yield Calculator

Percent Yield Formula:

\[ \text{Percent Yield} = \left( \frac{\text{Actual Yield}}{\text{Theoretical Yield}} \right) \times 100\% \]

Percent Yield:

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What Is Percent Yield?

Percent yield is a measure of the efficiency of a chemical reaction. It compares the actual amount of product obtained from an experiment (actual yield) to the maximum amount that could be produced according to stoichiometric calculations (theoretical yield).

2. How Does The Calculator Work?

The calculator uses the percent yield formula:

\[ \text{Percent Yield} = \left( \frac{\text{Actual Yield}}{\text{Theoretical Yield}} \right) \times 100\% \]

Where:

Actual Yield — The amount of product actually obtained from the experiment (g)
Theoretical Yield — The maximum amount of product that could be produced based on stoichiometry (g)

Explanation: The formula calculates what percentage of the theoretically possible product was actually obtained in the experiment.

3. Importance Of Percent Yield Calculation

Details: Percent yield is crucial for evaluating reaction efficiency, identifying sources of product loss, optimizing reaction conditions, and calculating economic viability in industrial processes.

4. Using The Calculator

Tips: Enter both actual and theoretical yields in grams. Both values must be positive numbers. The result will be displayed as a percentage.

5. Frequently Asked Questions (FAQ)

Q1: What is a good percent yield?
A: In most laboratory settings, a percent yield of 90-100% is considered excellent, while yields above 70% are generally acceptable. However, this varies by reaction type.

Q2: Why is percent yield often less than 100%?
A: Percent yield is typically less than 100% due to incomplete reactions, side reactions, product loss during purification, measurement errors, or experimental techniques.

Q3: Can percent yield be greater than 100%?
A: Yes, though uncommon. This can occur due to impurities in the product, measurement errors, incomplete drying of the product, or the presence of solvents.

Q4: How does percent yield differ from atom economy?
A: Percent yield measures experimental efficiency, while atom economy measures theoretical efficiency based on how many reactant atoms end up in the desired product.

Q5: How can I improve percent yield?
A: Optimize reaction conditions (temperature, concentration, catalysts), minimize product loss during transfer/purification, use pure reactants, and ensure complete reaction.