Activity Name: Learning about Stoichiometry with Hands-On Experiments

Time Schedule:

• 9:00-9:05 – Introduction (5 minutes) • 9:05-9:15 – Define Stoichiometry (10 minutes) • 9:15-9:30 – Experiment #1 – Making Oobleck (15 minutes) • 9:30-9:45 – Experiment #2 – Creating a Balloon Model (15 minutes) • 9:45-9:50 – Reflection and Discussion (5 minutes) • 9:50-10:00 – Wrap-Up (10 minutes)

Introduction (5 minutes):

Welcome students to the activity and explain what is going to happen. Briefly explain what stoichiometry is and why it is important for chemistry and for the world in general.

Define Stochiometry (10 minutes):

Explain what stoichiometry is and how it relates to chemical equations. Explain how to calculate the number of moles of a reactant given the number of moles of a product.

Experiment #1 – Making Oobleck (15 minutes):

Using 2 parts cornstarch and 1 part water, have students attempt to make oobleck. Explain that through this process, they will become familiar with the properties of a suspension and gain hands-on experience that reinforces their understanding of the mathematical principles behind stoichiometry.

Experiment #2 – Creating a Balloon Model (15 minutes):

Introduce the balloon models and explain that they can be used to visualize how certain elements interact with other elements (ex. hydrogen and oxygen) to form compounds. Use the balloon models as visual aids to explain how stoichiometry applies to the formation of these compounds.

Reflection and Discussion (5 minutes):

Discuss what the students learned from the activity and how it relates to the mathematical principles of stoichiometry.

Wrap-Up (10 minutes):

Review the key concepts learned in the activity. Offer additional resources for students to explore stoichiometry further. Thank the students for their participation and provide them with any end-of-class tasks.