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Percentage Yield Formula:
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Percentage yield calculation measures the efficiency of a chemical reaction or process by comparing the actual amount of product obtained to the theoretical maximum amount that could be produced under ideal conditions.
The calculator uses the percentage yield formula:
Where:
Explanation: The formula calculates what percentage of the theoretical maximum yield was actually achieved in the experiment or process.
Details: Percentage yield is crucial for evaluating reaction efficiency, optimizing processes, calculating economic viability, and identifying sources of product loss in chemical reactions and manufacturing processes.
Tips: Enter both actual and theoretical yields in grams. Both values must be positive numbers greater than zero for accurate calculation.
Q1: What is considered a good percentage yield?
A: In chemistry, yields above 90% are generally considered excellent, 80-90% are good, and below 60% may indicate significant issues with the reaction or process.
Q2: Why might actual yield be less than theoretical?
A: Common reasons include incomplete reactions, side reactions, product loss during purification, measurement errors, and experimental limitations.
Q3: Can percentage yield exceed 100%?
A: Normally no. Yields over 100% typically indicate measurement errors, incomplete drying of product, or presence of impurities that increase the measured mass.
Q4: How is theoretical yield calculated?
A: Theoretical yield is calculated from stoichiometry using the limiting reactant's amount and the balanced chemical equation for the reaction.
Q5: What's the difference between yield and purity?
A: Yield measures quantity of product obtained, while purity measures the quality (percentage of desired product vs impurities) in the obtained material.