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Percent Yield Formula:
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Percent yield is a measure of the efficiency of a chemical reaction or process. It compares the actual amount of product obtained (actual yield) to the maximum possible amount that could be obtained (theoretical yield) under ideal conditions.
The calculator uses the percent yield formula:
Where:
Explanation: The formula calculates the percentage of the theoretical yield that was actually obtained in the reaction or process.
Details: Percent yield is crucial for evaluating reaction efficiency, optimizing processes, calculating economic viability, and identifying potential issues in chemical reactions or manufacturing processes.
Tips: Enter the actual yield and theoretical yield in grams. Both values must be positive numbers, and the theoretical yield must be greater than zero.
Q1: What is considered a good percent yield?
A: In most chemical reactions, yields above 90% are considered excellent, 80-90% are good, and below 70% may indicate issues with the reaction or process.
Q2: Why might percent yield be less than 100%?
A: Common reasons include incomplete reactions, side reactions, product loss during purification, measurement errors, or experimental limitations.
Q3: Can percent yield exceed 100%?
A: While theoretically impossible, yields over 100% can occur due to impurities in the product, measurement errors, or incomplete drying of the product.
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: When is percent yield most important?
A: It's particularly important in pharmaceutical manufacturing, industrial chemistry, and research where reaction efficiency directly impacts cost and feasibility.