Selectivity Formula:
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Definition: Selectivity of a reaction is the ratio of the desired product formed (in moles) to the undesired product formed (in moles).
Purpose: It measures how efficiently a reaction produces the desired product relative to unwanted byproducts.
The calculator uses the formula:
Where:
Explanation: The moles of desired product are divided by moles of undesired product, then multiplied by 100 to get a percentage.
Details: High selectivity means more efficient reactions with less waste, which is crucial for industrial processes and green chemistry.
Tips: Enter the moles of desired product and moles of undesired product. Both values must be > 0.
Q1: What does 100% selectivity mean?
A: 100% selectivity means all reactants were converted to the desired product with no byproducts formed.
Q2: Can selectivity be greater than 100%?
A: Yes, if more desired product is formed than undesired product (ratio > 1).
Q3: How is selectivity different from yield?
A: Yield measures total product formed from reactants, while selectivity compares desired vs undesired products.
Q4: What factors affect selectivity?
A: Temperature, catalysts, reactant concentrations, and reaction mechanisms all influence selectivity.
Q5: How can I improve selectivity?
A: Use selective catalysts, optimize reaction conditions, or modify reactant structures.