1. What Is Percent Yield?

Percent yield is a measure of the efficiency of a chemical reaction, comparing the actual amount of product obtained to the maximum possible amount (theoretical yield) that could be produced under ideal conditions.

2. How Does The Calculator Work?

The calculator uses the percent yield formula:

Where:

• \( actual \) — Actual yield obtained from the experiment (g)
• \( theoretical \) — Theoretical maximum yield calculated from stoichiometry (g)

Explanation: The formula calculates the percentage of the theoretical yield that was actually obtained in the experiment, providing a measure of reaction efficiency.

3. Importance Of Percent Yield Calculation

Details: Percent yield is crucial for evaluating reaction efficiency, optimizing chemical processes, and determining economic viability in industrial applications.

4. Using The Calculator

Tips: Enter both actual and theoretical yields in grams. Both values must be positive numbers, with theoretical yield greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What is considered a good percent yield?
A: In most chemical reactions, yields above 90% are considered excellent, while yields between 70-90% are good. Yields below 50% may indicate issues with the reaction.

Q2: Why is percent yield never 100%?
A: Percent yield is rarely 100% due to various factors including incomplete reactions, side reactions, product loss during purification, and measurement errors.

Q3: Can percent yield exceed 100%?
A: While theoretically impossible, yields over 100% can occur due to impurities in the product, incomplete drying, or measurement errors.

Q4: How does percent yield differ from atom economy?
A: Percent yield measures experimental efficiency, while atom economy measures theoretical efficiency based on molecular weights of reactants and products.

Q5: What factors affect percent yield?
A: Temperature, pressure, catalyst efficiency, reactant purity, reaction time, and purification methods can all significantly impact the final yield.