Description
Students investigate the relationship between reactant concentration and reaction rate based on the real-world scenario of a person with acid indigestion consuming an antacid tablet. The reaction rate is quantified by collecting the volume of carbon dioxide gas collected over time using a water displacement technique. Students will address the driving question, “How does the concentration of hydrochloric acid affect the reaction rate for the reaction that occurs when someone consumes a calcium carbonate antacid?”
Time Requirement
Total, 130 minutes. Teacher prep, 30 minutes. Pre-lab, 10 minutes. Investigation, 60 minutes. Assessment, 30 minutes.
Digital Resources
Includes 1-year access to digital resources that support 3-dimensional instruction for NGSS. Digital resources may include a teacher manual and student guide, pre-lab activities and setup videos, phenomenon videos, simulations, and post-lab analysis and assessments.
Crosscutting Concepts
Energy and Matter: Flows, Cycles, and Conservation
Science and Engineering Practices
Constructing Explanations and Designing Solutions
Learning Objectives
- Determine if hydrochloric acid concentration affects the reaction rate with calcium carbonate through data interpretation and graphical analysis.
- Collect carbon dioxide gas by water displacement.
Prerequisite Knowledge and Skills
Students should be familiar with collecting a gas by water displacement, writing and balancing chemical equations, and using a spreadsheet program to record and graph data.