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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 produced (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 experiment.
Details: Percent yield is crucial for evaluating the efficiency of chemical reactions, optimizing industrial processes, and determining the economic viability of production methods. It helps identify potential issues such as incomplete reactions, side reactions, or product loss during purification.
Tips: Enter both actual yield and theoretical yield in grams. Both values must be positive numbers greater than zero for accurate calculation.
Q1: What is a good percent yield?
A: In most chemical reactions, a percent yield of 90-100% is considered excellent, while yields below 50% may indicate problems with the reaction or purification process.
Q2: Why is percent yield never 100%?
A: Percent yield is rarely 100% due to factors such as incomplete reactions, side reactions, product loss during transfer or purification, and measurement errors.
Q3: Can percent yield be greater than 100%?
A: Yes, though uncommon. This can occur due to measurement errors, incomplete drying of the product, or the presence of impurities that add to the mass.
Q4: How do I calculate theoretical yield?
A: Theoretical yield is calculated using stoichiometry based on the limiting reactant in the balanced chemical equation.
Q5: What factors affect percent yield?
A: Factors include reaction completeness, side reactions, purification losses, measurement accuracy, and experimental technique.