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Applications of Le Chatelier’s Principle—College Level Classic General Chemistry Laboratory Kit

By: The Flinn Staff

Item #: AP7971

Price: $77.95

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In the College Level Guided-Inquiry Lab Kit Applications of Le Chatelier’s Principle, investigate six chemical equilibrium systems to analyze patterns and trends in the principles and concepts of equilibrium.

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In this guided-inquiry lab, students investigate six chemical equilibrium systems to analyze patterns and trends in the principles, concepts and definitions of equilibrium.

Students begin with an activity that introduces the properties of a system at equilibrium: the reversible complex-ion reaction between iron(III) nitrate and potassium thiocyanate. Deliberate “stresses,” such as temperature changes and changes in the amounts of reactants and products, are added to the system and students analyze the resulting color changes. This procedure provides a model for guided-inquiry analysis of five additional equilibrium systems. Inquiry activities include a reversible acid–base indicator reaction, copper and cobalt complex ions, gas–liquid solubility of carbon dioxide and the solubility of magnesium hydroxide. For convenience, these systems may be set up as lab stations. Students may also be tasked to create a rainbow-colored display using the equilibrium systems as an optional extension or cooperative class activity.This inquiry lab integrates essential science practice along with analyzing evidence based on data to construct explanations of natural phenomena. Complete for 24 students working in pairs.


Materials Included in Kit:
Ammonium hydroxide reagent, 30 mL
Bromcresol green solution, 0.04%, 35 mL
Bromthymol blue solution, 0.04%, 20 mL
Calcium chloride, 5g
Cobalt chloride hexahydrate, 1% in 95% ethyl alcohol, 100 mL
Copper(II) sulfate solution, 0.2 M, 100 mL
Hydrochloric acid solution 1 M, 15 mL
Hydrochloric acid solution 6 M, 20 mL
Hydrochloric acid solution 0.1 M, 25 mL
Hydrochloric acid solution 3 M, 250 mL
Iron(III) nitrate solution, 0.2 M, 125 mL
Milk of magnesia, 150 mL
Potassium nitrate, 15 g
Potassium thiocyanate, 10g
Potassium thiocyanate solution, 0.1 M, 30 mL
Seltzer water, 8 oz, bottle
Silver nitrate solution, 0.1 M, 30 mL
Sodium Hydroxide Solution, 0.1 M, 30 mL
Sodium phosphate, monohydrate,  15 g
Universal indicator solution, 20 mL
Bromcresol green indicator color chart
Culture (petri) dish, 90 x 15 mm, 12
Pipet, Beral-type, graduated, 25
Syringe tip cap, 2
Syringe, disposable, 35 mL, 2