1. What is Percent Yield?

Percent yield is a measure of the efficiency of a chemical reaction, comparing the amount of product actually obtained (actual yield) to the maximum amount possible (theoretical yield).

2. How Does the Calculator Work?

The calculator uses the percent yield formula:

Where:

• Actual — The amount of product actually obtained from the reaction (grams)
• Theoretical — The maximum possible amount of product (grams)

Explanation: The formula calculates what percentage of the theoretical yield was actually achieved in the experiment.

3. Importance of Yield Calculation

Details: Percent yield helps chemists evaluate reaction efficiency, identify potential problems in experimental procedures, and optimize reaction conditions.

4. Using the Calculator

Tips: Enter both actual and theoretical yields in grams. Both values must be positive numbers. Theoretical yield should be calculated from stoichiometry.

5. Frequently Asked Questions (FAQ)

Q1: What is a good percent yield?
A: While 100% is ideal, yields above 90% are excellent, 80-90% are good, and 50-80% are fair. Below 50% suggests significant issues.

Q2: Why might actual yield be less than theoretical?
A: Possible reasons include incomplete reactions, side reactions, purification losses, or measurement errors.

Q3: Can percent yield exceed 100%?
A: Yes, but this usually indicates impurities, incomplete drying, or measurement errors rather than a true yield >100%.

Q4: How do I calculate theoretical yield?
A: Use stoichiometry based on the limiting reactant. Convert moles of limiting reactant to moles of product, then to grams.

Q5: How does this differ from atom economy?
A: Atom economy considers all atoms in reactants, while percent yield compares actual to theoretical product amounts.