Overall Fractional Yield Formula:
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Definition: Overall fractional yield of a product is a measure of how selective a particular reactant is in forming a particular product, from inlet to a particular point such as the outlet.
Purpose: It helps chemists and chemical engineers evaluate the efficiency of a chemical reaction in converting reactants to desired products.
The calculator uses the formula:
Where:
Explanation: The formula compares the amount of product formed to the amount of reactant that was actually consumed in the reaction.
Details: Calculating fractional yield helps in process optimization, cost analysis, and environmental impact assessment of chemical processes.
Tips: Enter the total moles of product formed, initial moles of reactant, and moles of unreacted reactant. All values must be ≥ 0, and (R₀ - Rf) must be > 0.
Q1: What does a fractional yield of 1 mean?
A: A yield of 1 means all the consumed reactant was converted to the desired product (100% selectivity).
Q2: How is this different from conversion?
A: Conversion measures how much reactant was used, while fractional yield measures how much of the used reactant became the desired product.
Q3: Can fractional yield be greater than 1?
A: Normally no, unless there are measurement errors or side reactions that produce additional moles of product.
Q4: What's a good fractional yield value?
A: It depends on the process, but industrial processes typically aim for yields above 0.7-0.9.
Q5: How do I measure the unreacted reactant?
A: Through analytical techniques like chromatography, spectroscopy, or titration after the reaction.