1. What Is Percent Yield?

Percent yield is a measure of the efficiency of a chemical reaction, calculated as the ratio of the actual yield to the theoretical yield, expressed as a percentage. It indicates how much product was actually obtained compared to the maximum possible amount.

2. How Does The Calculator Work?

The calculator uses the percent yield formula:

Where:

• Actual Yield — The amount of product actually obtained from the reaction (g)
• Theoretical Yield — The maximum amount of product that could be obtained from the reaction (g)

Explanation: The formula compares the actual experimental result with the ideal theoretical prediction to determine the reaction efficiency.

3. Importance Of Percent Yield Calculation

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

4. Using The Calculator

Tips: Enter both actual yield and theoretical yield in grams. Both values must be positive numbers greater than zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What is a good percent yield value?
A: In most chemical reactions, a percent yield of 90-100% is considered excellent, while yields below 50% may indicate significant issues with the reaction or purification process.

Q2: Why is percent yield always 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 limitations.

Q3: Can percent yield be greater than 100%?
A: While theoretically impossible, yields over 100% can occur due to measurement errors, impure reactants, incomplete drying of product, or presence of impurities that add mass.

Q4: How is theoretical yield calculated?
A: Theoretical yield is calculated using stoichiometry based on the limiting reactant, reaction coefficients, and molar masses of reactants and products.

Q5: What factors affect percent yield?
A: Factors include reaction completeness, side reactions, purification efficiency, measurement accuracy, temperature, pressure, catalyst effectiveness, and reactant purity.