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Molar Extinction Coefficient Formula

GoMolar Extinction Coefficient given Intensities of Radiation Formula

GoMolar Extinction Coefficient given Slope of Plot Formula

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The Molar Extinction Coefficient is a measure of how strongly a chemical species or substance absorbs light at a particular wavelength. Check FAQs

ε = \frac{A}{c \cdot l}

ε - Molar Extinction Coefficient?A - Absorbance?c - Concentration of Solution?l - Thickness of Cell?

Molar Extinction Coefficient Example

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Here is how the Molar Extinction Coefficient equation looks like with Values.

Here is how the Molar Extinction Coefficient equation looks like with Units.

Here is how the Molar Extinction Coefficient equation looks like.

1.9E+9 = \frac{0.92}{97 \cdot 50.5}

1.9E+9cm²/mol = \frac{0.92}{97mol/m³ \cdot 50.5nm}

1.9E+9 = \frac{0.92}{97 \cdot 50.5}

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Molar Extinction Coefficient Solution

Follow our step by step solution on how to calculate Molar Extinction Coefficient?

FIRST Step Consider the formula

ε = \frac{A}{c \cdot l}

Next Step Substitute values of Variables

∴

ε = \frac{0.92}{97mol/m³ \cdot 50.5nm}

Next Step Convert Units

∴

ε = \frac{0.92}{97mol/m³ \cdot 5.1E-8m}

Next Step Prepare to Evaluate

∴

ε = \frac{0.92}{97 \cdot 5.1E-8}

Next Step Evaluate

∴

ε = 187812.595692559m²/mol

Next Step Convert to Output's Unit

∴

ε = 1878125956.92559cm²/mol

LAST Step Rounding Answer

∴

ε = 1.9E+9cm²/mol

Molar Extinction Coefficient Formula Elements

Variables

Molar Extinction Coefficient

The Molar Extinction Coefficient is a measure of how strongly a chemical species or substance absorbs light at a particular wavelength.

Symbol: ε

Measurement: Molar Extinction CoefficientUnit: cm²/mol

Note: Value can be positive or negative.

Formulas to find Molar Extinction Coefficient

Absorbance

Absorbance is also known as optical density of the solution used in calculating the concentration of a solution on the basis of its light absorption.

Symbol: A

Measurement: NAUnit: Unitless

Note: Value can be positive or negative.

Formulas to find Absorbance

Concentration of Solution

The Concentration of Solution is the quantity of a solute that is contained in a particular quantity of solvent or solution.

Symbol: c

Measurement: Molar ConcentrationUnit: mol/m³

Note: Value can be positive or negative.

Formulas to find Concentration of Solution

Thickness of Cell

Thickness of Cell is useful in calculating the concentration of a solution on the basis of its light absorption.

Symbol: l

Measurement: LengthUnit: nm

Note: Value can be positive or negative.

Formulas to find Thickness of Cell

Other Formulas to find Molar Extinction Coefficient

Go Molar Extinction Coefficient given Intensities of Radiation

ε = \log 10 (\frac{I i}{I radiation}) \cdot (\frac{1}{l \cdot c})

Go Molar Extinction Coefficient given Slope of Plot

ε = \frac{m}{l}

Other formulas in Beer Lambert law category

Go Beer-Lambert law given Intensity of Radiation

A = \log 10 (\frac{I i}{I radiation})

Go Absorbance using Beer-Lambert Law

A = ε \cdot c \cdot l

Go Concentration of Solution

c = \frac{A}{l \cdot ε}

Go Intensity of Incident Radiation

I i = I radiation \cdot 10^{A}

How to Evaluate Molar Extinction Coefficient?

Molar Extinction Coefficient evaluator uses Molar Extinction Coefficient = Absorbance/(Concentration of Solution*Thickness of Cell) to evaluate the Molar Extinction Coefficient, The Molar extinction coefficient formula is defined as a measure of how strongly a chemical species or substance absorbs light at a particular wavelength. Molar Extinction Coefficient is denoted by ε symbol.

How to evaluate Molar Extinction Coefficient using this online evaluator? To use this online evaluator for Molar Extinction Coefficient, enter Absorbance (A), Concentration of Solution (c) & Thickness of Cell (l) and hit the calculate button.

FAQs on Molar Extinction Coefficient

What is the formula to find Molar Extinction Coefficient?

The formula of Molar Extinction Coefficient is expressed as Molar Extinction Coefficient = Absorbance/(Concentration of Solution*Thickness of Cell). Here is an example- 1.9E+13 = 0.92/(97*5.05E-08).

How to calculate Molar Extinction Coefficient?

With Absorbance (A), Concentration of Solution (c) & Thickness of Cell (l) we can find Molar Extinction Coefficient using the formula - Molar Extinction Coefficient = Absorbance/(Concentration of Solution*Thickness of Cell).

What are the other ways to Calculate Molar Extinction Coefficient?

Here are the different ways to Calculate Molar Extinction Coefficient-

Molar Extinction Coefficient=log10(Intensity of Incident Radiation/Intensity of Transmitted Radiation)*(1/(Thickness of Cell*Concentration of Solution))
Molar Extinction Coefficient=Slope of Line/Thickness of Cell

Can the Molar Extinction Coefficient be negative?

Yes, the Molar Extinction Coefficient, measured in Molar Extinction Coefficient can be negative.

Which unit is used to measure Molar Extinction Coefficient?

Molar Extinction Coefficient is usually measured using the Square Centimeter per Mole[cm²/mol] for Molar Extinction Coefficient. Square Meter per Decimole[cm²/mol], Square Meter per Mole[cm²/mol], Square Millimeter per Micromole[cm²/mol] are the few other units in which Molar Extinction Coefficient can be measured.

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Molar Extinction Coefficient Formula

​GoMolar Extinction Coefficient given Intensities of Radiation Formula

​GoMolar Extinction Coefficient given Slope of Plot Formula

Molar Extinction Coefficient Example

Molar Extinction Coefficient Solution

Molar Extinction Coefficient Formula Elements

Other Formulas to find Molar Extinction Coefficient

Other formulas in Beer Lambert law category

How to Evaluate Molar Extinction Coefficient?

FAQs on Molar Extinction Coefficient

Variable Name

GoMolar Extinction Coefficient given Intensities of Radiation Formula

GoMolar Extinction Coefficient given Slope of Plot Formula