Question

Determine the concern traction in [M] of a solution that has an absorbance of 0.420

Answer 1

The Concenteration of a solution that has an absorbance of 0.420

is 5.27 μМ

What is Absorbance ?

Absorbance (A), also known as optical density (OD), is the quantity of light absorbed by a solution.

Transmittance is the quantity of light that passes through a solution.

We can measures the absorbance of a sample using a spectrophotometer and the value is A = 0.420.

We can calculate the concentration of the sample using the Beer-Lambert law, which relates the attenuation of light to the properties of the material through which the light is travelling, through the following equation.

A = ∈ x c x d

Where ;

• A =  Absorbance
• ∈ =  molar absorptivity of the species (7.96 × 10⁴ M⁻¹ cm⁻¹)
• c  =  concentration
• d = optical path length (1.00 cm)
  
  

Therefore,

c = A / ∈ x d

  = 0.420 / 7.96 × 10⁴ M⁻¹ cm⁻¹ x 1.00 cm  

  = 5.27 μМ

Learn more about spectrophotometer here ; brainly.com/question/20956841

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