Analytical Chemistry II: Colorimetry Theory
15 Questions
2 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the origin of color in inorganic materials?

  • F-F transition
  • d-d transition (correct)
  • Defect in crystal of solid lattice
  • Chemical reaction

What type of solutions absorb some wavelengths and emit others?

  • Inorganic solutions
  • Transparent solutions
  • Colored solutions (correct)
  • Dark solutions

What type of materials have functional groups with unsaturated linkage that cause color?

  • Organic materials (correct)
  • Colored solutions
  • Inorganic materials
  • Transparent solutions

According to the basic law of colorimetry, which portions of light can be neglected?

<p>Reflected and scattered (B)</p> Signup and view all the answers

What is the relation between the concentration of a solution and the intensity of incident light in colorimetry?

<p>Direct relation (B)</p> Signup and view all the answers

What is the main characteristic of dark solutions?

<p>Absorbs light completely (D)</p> Signup and view all the answers

What is the relationship between transmittance (T) and absorbance (A) of a solution?

<p>A = -log T (C)</p> Signup and view all the answers

What does the Beer-Lambert law tell us about the absorption of light by a solution?

<p>The absorption is directly proportional to the concentration and path length (D)</p> Signup and view all the answers

How does the concentration of absorbing molecules affect the absorbance of light according to Beer's law?

<p>The absorbance increases with increasing concentration (A)</p> Signup and view all the answers

What is the unit of molar absorptivity (Ԑ) for a substance?

<p>L/mol/cm^2 (A)</p> Signup and view all the answers

What is a characteristic of molar absorptivity (Ԑ) at an absorption maximum for a species?

<p>It varies with the wavelength of incident light (B)</p> Signup and view all the answers

What is the effect of increasing path length on the absorbance of light in a solution?

<p>The absorbance increases with increasing path length (D)</p> Signup and view all the answers

How does the molar absorptivity (Ԑ) affect the sensitivity of a colormetric method?

<p>As Ԑ increases, sensitivity increases (D)</p> Signup and view all the answers

What does 'concentration' refer to in the context of absorption of light?

<p>The amount of solute per unit volume of solution (A)</p> Signup and view all the answers

What is the relationship between absorbance (A) and concentration (c) according to Beer's law?

<p>$A = \varepsilon cL$ (A)</p> Signup and view all the answers

More Like This

Introduction to Spectrophotometry
16 questions
Tetracycline Assay Methods Overview
8 questions
Colorimetry Overview
8 questions

Colorimetry Overview

WellBredFrancium avatar
WellBredFrancium
Use Quizgecko on...
Browser
Browser