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Product 12565

By: Jim and Julie Ealy, Retired , The Peddie School, Hightstown, NJ

The Overhead Equilibrium Reaction Chemical Demonstration Kit is a dynamic activity, illustrating LeChâtelier's principle of equilibrium. A colorless solution will become dark orange then colorless again by the addition of certain solutions.

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Product Details

A colorless solution is placed in a Petri dish on an overhead projector. The solution will become dark orange then colorless again by the addition of certain solutions and solids. A dynamic demonstration to illustrate LeCh,telier's principle of equilibrium. Teacher Demonstration Notes included. Enough materials are provided to perform the demonstration seven times. Concepts: LeCh,telier's Principle, equilibrium, complex ions. Time Required: 15 minutes Chemicals Provided: Potassium thiocyanate solid and solution, iron(III) nitrate solution, and sodium phosphate monobasic.

Correlation to Next Generation Science Standards (NGSS)

Science & Engineering Practices

Asking questions and defining problems
Planning and carrying out investigations
Engaging in argument from evidence
Analyzing and interpreting data
Obtaining, evaluation, and communicating information

Disciplinary Core Ideas

MS-PS1.B: Chemical Reactions
HS-PS1.B: Chemical Reactions

Crosscutting Concepts

Cause and effect
Stability and change

Performance Expectations

MS-PS1-2. Analyze and interpret data on the properties of substances before and after the substances interact to determine if a chemical reaction has occurred.
HS-PS1-2. Construct and revise an explanation for the outcome of a simple chemical reaction based on the outermost electron states of atoms, trends in the periodic table, and knowledge of the patterns of chemical properties.
HS-PS1-6. Refine the design of a chemical system by specifying a change in conditions that would produce increased amounts of products at equilibrium.