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Product 12700

By: John Brodemus, Richards H.S., Oak Lawn, IL

With the Absorption Spectroscopy Chemical Demonstration Kit, instructors can demonstrate continuous and absorption spectra to students while using the ability of diffraction grating to dissect light passed through various colored solutions.

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What is the relationship between the color of a solution and the wavelengths of light passing through it? With this kit, teachers can demonstrate to their students continuous and absorption spectra. It works in almost any room with the lights off without the need for gas, flames or expensive spectrum tube power supplies.

The kit uses the ability of a diffraction grating to dissect light that is passed through various colored solutions. Students view band absorption as a continuous spectrum filtered by one of the provided solutions. Using these data and a color wheel, allow students to make their own predictions. Students also observe dark line spectra from chloride solutions of erbium and praseodymium, similar to the spectra studied by astronomers in analyzing light from stars across the cosmos.

Concepts: Spectroscopy, visible light spectrum, absorbance.
Time Required: One class period


Correlation to Next Generation Science Standards (NGSS)

Science & Engineering Practices

Developing and using models
Planning and carrying out investigations
Analyzing and interpreting data
Constructing explanations and designing solutions
Engaging in argument from evidence

Disciplinary Core Ideas

MS-PS1.A: Structure and Properties of Matter
MS-PS4.A: Wave Properties
MS-PS4.B: Electromagnetic Radiation
MS-LS1.A: Structure and Function
HS-PS1.A: Structure and Properties of Matter
HS-PS4.A: Wave Properties
HS-PS4.B: Electromagnetic Radiation
HS-LS1.A: Structure and Function

Crosscutting Concepts

Systems and system models
Energy and matter
Structure and function
Patterns

Performance Expectations

MS-PS4-2. Develop and use a model to describe that waves are reflected, absorbed, or transmitted through various materials.
MS-LS1-8. Gather and synthesize information that sensory receptors respond to stimuli by sending messages to the brain for immediate behavior or storage as memories.
HS-PS4-1. Use mathematical representations to support a claim regarding relationships among the frequency, wavelength, and speed of waves traveling in various media.