Order early for pre-holiday delivery. Flinn will be closed December 24th, 2025,
through January 4th, 2026, reopening Monday, January 5th, 2026.
Orders received after 10:30 AM Central Time on Tuesday, December 23rd, 2025,
will ship after we return.
In the Penny-Ante Equilibrium: A Classroom Activity—ChemTopic™ Lab Activity, pennies are used as reactants and products in a reversible reaction to answer questions about the fundamental nature of equilibrium and what happens to the amount of reactants and products when it is reached. Available as part of the Exploring Equilibrium—ChemTopic™ Labs digital collection. Click the Price link for digital collection pricing.