Innovating Science® - APï®® Chemistry Lab #13: Le Chatelier and the Colors of the Rainbow

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Chemical products can only be purchased by Corporations and Educational Institutions. Private Individuals are not eligible.

Manufacturer ID - IS8113

Students will learn about acids and bases through a class discussion and then test a dilute acid and dilute base with neutral litmus paper to learn how the paper indicates something is acidic or basic. Once that skill is learned they can move on to test some common items that would be found around their house to determine if they are acids or bases. Optional: Extra litmus paper is included to test more items either from home or around the school building for a greater understanding of acids and bases. The activity contains enough materials for 6 groups of students.

Students will investigate Le Chatelier's principle and why it works. They will also investigate this principle by testing several systems at equilibrium and then selecting specific ones to produce the colors of the rainbow based on specific applications of Le Chatelier's principle. Students will then be challenged by selecting which reaction system to use for which color in producing the rainbow while trying to only use a given "stress" once. The activity contains enough materials for 15 groups of students as well as a Teacher's Guide and Student Study Guide Copymasters. Meets Big Idea 6, Investigation 13, Primary Learning Objective 6.9.

Kit Includes:
3 X 30mL Bromothymol Blue, 0.04%
3 X 15mL Hydrochloric Acid, 0.1N
3 X 15mL Sodium Hydroxide, 0.1N
3 X 15mL Sodium Chloride, 0.1M
3 X 250mL Potassium Thiocyanate, 0.1M
3 X 15mL Ferric Nitrate, 0.2M Fe(No)3
3 X 10g Potassium Thiocyanate
3 X 10g Iron(III)Chloride
3 X 10g Sodium Phosphate Tribasic
3 X 15mL Potassium Nitrate, 0.1M
3 X 250mL Copper (II) Sulfate
3 X 15mL Hydrochloric Acid, 1.0N
3 X 15mL Ammonium Hydroxide, ACS 28-30%
3 X 10g Copper(II)Chloride
3 X 15mL Hydrochloric Acid, T/G 32%
3 X 10g Cobalt Chloride Hexahydrate
3 X 250mL Ethyl Alcohol, R/G 95% Denatured
3 X 30mL Deionized Water
3 X 30mL Acetone
3 X 10g Sodium Chloride
3 X 15mL Methyl Red Indicator, 0.3%
3 X 15mL Silver Nitrate, 0.1M

Materials needed but not supplied:
Beaker, 250mL
Beaker, 50mL
Graduated Cylinder, 10mL
Graduated Cylinder, 50mL
Hot Plate
Labeling or Marking Pens
Magnetic Stir Plate
Stir Bar
Test Tube
Test Tube Holder
Test Tube Rack
Volumetric Flask, 500mL
Wash Bottle

DOT Info:
UN1170, Ethanol, 3, II, Ltd Qty

WARNING: This product can expose you to chemicals including Strong inorganic acid mists containing sulfuric acid and Methanol, which are known to the State of California to cause cancer and reproductive harm. For more information go to
Brand Name
Innovating Science®
Performance Expectations 5-PS1-3
Cross Cutting Concepts Cause and Effect
Scale, Proportion, and Quantity
Engineering Practices Planning and Carrying Out Investigations
Box Used 12663SBOX
Width (in) 6.25
Height (in) 4
Weight (oz) 19.9
Weight (lb) 1.24
Country of Origin US
Harmonization Code 9023.00.0000
DOT Description Non regulated

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