Featured in PASCO’s College Chemistry Instructor Guide

College Chemistry Instructor Guide

(PS-3803A)

College Instructor edition with 36 experiments covering introductory and general chemistry topics.

Absorption Spectra

Lab Summary

Use a spectrometer to learn about the composition of the electromagnetic radiation in the visible range, to develop an understanding of how the interaction of objects and solutions with light result in the perception of color, and to dispel misconceptions of objects "having color."

A spectrometer is required to perform this lab. We recommend PASCO's Wireless Spectrometer.

Theory

Students learn about the composition of the electromagnetic radiation in the visible range, develop an understanding of how the interaction of objects and solutions with light result in the perception of color, and dispel their misconception of objects "having color".

Method

Students gain experience conducting the following procedures:

  • Using a simple spectrophotometer and making spectroscopic measurements.
  • Applying color charts to determine the wavelengths transmitted and absorbed that result in various colors.

Sensors / Equipment Used:

Amadeus Spectrometer System

(SE-7183)

Combine with the Xplorer GLX to provide an excellent low cost solution to Spectrometry in the High School Lab.

PASPORT Sensor Extension Cable

(PS-2500)

Allows an additional two meter length extension on all PASPORT sensors.

Materials Used:

Glass cuvette with cap
Test tubes, large - 6
Test tube rack 
Graduated cylinder, 10-mL 
0.1 M Iron(III) chloride (FeCl3) - 10 mL
0.1 M Copper(II) chloride (CuCl2) - 10 mL
0.1 M Cobalt chloride (CoCl2) - 10 mL
0.1 M Nickel(II) chloride (NiCl2) - 10 mL
0.1 M Sodium chloride (NaCl) - 10 mL
Color chart 
Wash bottle with distilled water 
Marking pen

The Associated Bundle:

Advanced Chemistry Standard Sensor Bundle

(PS-2928A)

Contains the probeware for completing experiments in the College Chemistry lab manual.

Interface Required

This experiment may require software and an interface for data collection.