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Percent Enantiomeric Excess is a measurement of purity used for chiral substances. It reflects the percent to which a sample contains one enantiomer in greater amounts than the other. Check FAQs
%ee=|FR-FS|100
%ee - Percent Enantiomeric Excess?FR - Mole Fraction of R?FS - Mole Fraction of S?

Percent Enantiomeric Excess Example

With values
With units
Only example

Here is how the Percent Enantiomeric Excess equation looks like with Values.

Here is how the Percent Enantiomeric Excess equation looks like with Units.

Here is how the Percent Enantiomeric Excess equation looks like.

40Edit=|0.7Edit-0.3Edit|100
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Percent Enantiomeric Excess Solution

Follow our step by step solution on how to calculate Percent Enantiomeric Excess?

FIRST Step Consider the formula
%ee=|FR-FS|100
Next Step Substitute values of Variables
%ee=|0.7-0.3|100
Next Step Prepare to Evaluate
%ee=|0.7-0.3|100
LAST Step Evaluate
%ee=40

Percent Enantiomeric Excess Formula Elements

Variables
Functions
Percent Enantiomeric Excess
Percent Enantiomeric Excess is a measurement of purity used for chiral substances. It reflects the percent to which a sample contains one enantiomer in greater amounts than the other.
Symbol: %ee
Measurement: NAUnit: Unitless
Note: Value can be positive or negative.
Mole Fraction of R
Mole Fraction of R is a quantity defined as the ratio between the amount of a constituent substance and the total amount of all constituents in a mixture.
Symbol: FR
Measurement: NAUnit: Unitless
Note: Value can be positive or negative.
Mole Fraction of S
Mole Fraction of S is a quantity defined as the ratio between the amount of a constituent substance and the total amount of all constituents in a mixture.
Symbol: FS
Measurement: NAUnit: Unitless
Note: Value can be positive or negative.
abs
The absolute value of a number is its distance from zero on the number line. It's always a positive value, as it represents the magnitude of a number without considering its direction.
Syntax: abs(Number)

Other Formulas to find Percent Enantiomeric Excess

​Go Percent Enantiomeric Excess Considering Amount of Enantiomer
%ee=(|R-S|R+S)100

Other formulas in Optical Activity category

​Go Specific Rotation of Optically Active Compound
[α]D=αlc
​Go Optical Purity
OP=([α]obs[α]max)100
​Go Enantiomeric Excess
ee=|FR-FS|
​Go Fraction of Major Isomer
FR=50+(%ee2)

How to Evaluate Percent Enantiomeric Excess?

Percent Enantiomeric Excess evaluator uses Percent Enantiomeric Excess = abs(Mole Fraction of R-Mole Fraction of S)*100 to evaluate the Percent Enantiomeric Excess, The Percent Enantiomeric Excess formula is defined as a measurement of purity used for chiral substances. It reflects the percent to which a sample contains one enantiomer in greater amounts than the other. Percent Enantiomeric Excess is denoted by %ee symbol.

How to evaluate Percent Enantiomeric Excess using this online evaluator? To use this online evaluator for Percent Enantiomeric Excess, enter Mole Fraction of R (FR) & Mole Fraction of S (FS) and hit the calculate button.

FAQs on Percent Enantiomeric Excess

What is the formula to find Percent Enantiomeric Excess?
The formula of Percent Enantiomeric Excess is expressed as Percent Enantiomeric Excess = abs(Mole Fraction of R-Mole Fraction of S)*100. Here is an example- 40 = abs(0.7-0.3)*100.
How to calculate Percent Enantiomeric Excess?
With Mole Fraction of R (FR) & Mole Fraction of S (FS) we can find Percent Enantiomeric Excess using the formula - Percent Enantiomeric Excess = abs(Mole Fraction of R-Mole Fraction of S)*100. This formula also uses Absolute function(s).
What are the other ways to Calculate Percent Enantiomeric Excess?
Here are the different ways to Calculate Percent Enantiomeric Excess-
  • Percent Enantiomeric Excess=(abs(Moles of R-Moles of S)/(Moles of R+Moles of S))*100OpenImg
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