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Absorbance

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AP Chemistry

Definition

Absorbance refers to the amount of light absorbed by a substance when it interacts with electromagnetic radiation. It is commonly measured using a spectrophotometer or colorimeter to determine the concentration of a solute in a solution based on the Beer-Lambert Law.

"Absorbance" also found in:

Subjects (16)

Practice Questions (5)

An analyte at a concentration of 5.0x10^-3 M gives an absorbance of 0.50 at a specific wavelength and a cell path length of 1.00 cm. What is the molar absorptivity?
The absorbance of an iron thiocyanate solution containing 0.005 mg Fe/mL was reported as 0.490 at 540 nm. Calculate the specific absorptivity under the assumption that a 1.00 cm cuvette was used.
The absorbance of an iron thiocyanate solution containing 0.005 mg Fe/mL was reported as 0.490 at 540 nm. What will be the absorbance if the solution is diluted to twice its original volume?
A solution containing 40.00g/L of a substance had an absorbance of 0.425 in a 1.00 cm cell at 690 nm. If 5.00 mL of this solution was diluted with water to 100.0 mL, what is the absorbance of the new solution at 690 nm?
Copper sulfate creates an extraordinarily blue solution in water. Which of the following experimental techniques could a scientist use to determine the concentration of copper sulfate based on absorbance?

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Absorbance

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AP Chemistry

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Subjects (16)

Practice Questions (5)

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Absorbance

from class:

AP Chemistry

Definition

Related terms

"Absorbance" also found in:

Subjects (16)

Practice Questions (5)

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AP® and SAT® are trademarks registered by the College Board, which is not affiliated with, and does not endorse this website.

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