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ap chemistry - beer-lambert law & spectroscopy

originally streamed in 2020 with Jacob JeffriesStudent
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Learn how to use the Beer-Lambert Law (A = εbc) to connect light absorption with solution concentration. This AP Chemistry review breaks down the equation, walks through calculations, and shows you how to apply it to spectroscopy problems for Unit 4. ...more

curriculum note

The video description references 'Unit 4' for Beer-Lambert Law, but in the current AP Chemistry course this content is covered in Unit 3 (Intermolecular Forces and Properties). The current topic tags also incorrectly list the Photoelectric Effect (3.12), which is not covered in this video.

covered in this stream

units
Unit 3 – Properties of Substances and MixturesUnit 5 – Kinetics
topics
3.13 Beer-Lambert Law 3.11 Spectroscopy and the Electromagnetic SpectrumBeer-Lambert Law5.2 Introduction to Rate Law5.3 Concentration Changes Over Time

timestamps

  • 0:00

    Introduction to Beer-Lambert Law

  • 0:31

    Color and Light Absorption

  • 1:35

    Object Color Examples

  • 2:37

    Solution Color in Lakes

  • 3:40

    Incident and Reflected Rays

  • 4:44

    Electromagnetic Waves Explained

  • 5:48

    Amplitude and Intensity

  • 7:22

    Transmitted Intensity Relationship

  • 8:59

    Solution Path Length

  • 10:35

    Light Dampening in Medium

  • 11:36

    Concentration Effects on Absorption

  • 13:43

    Exponential Decay Analogy

  • 15:50

    Log Base 10 Conversion

  • 16:54

    Absorbance Definition

  • 18:26

    Measuring Device Setup

  • 19:31

    Units of Measurement

  • 21:37

    Angled Light Path Geometry

  • 23:42

    Graphing for Concentration

  • 25:46

    Kinetics Applications

  • 27:23

    First-Order Rate Law

  • 29:30

    Graphing Ln Concentration

  • 31:02

    Substituting with Absorbance

  • 32:38

    Advantages of Absorbance Data

  • 34:41

    Finding Molar Extinction Coefficient

  • 36:47

    Solving for Absorptivity

  • 39:57

    Acid-Base Titration Application

  • 42:34

    Titration Curve Analysis

  • 43:36

    Flask Writing Precautions

  • 44:39

    AP Exam Key Points

  • 46:15

    Equation Sheet Notes

  • 46:46

    Q&A Session

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