Reaction Rates: When Surface Area Matters!
- Understand how chemical reactions can be controlled and manipulated
- Calculate average rates of chemical reactions from experimental data
- Relate rates of chemical reactions to surface area of a reactant and frequency of collisions between reacting particles
OverviewHow does surface area affect the speed of a chemical reaction? Let your students find out in this sizzling lesson plan! In this project, they will explore this correlation by crushing Alka-Seltzer® tablets into different sized particles and measuring how long it takes for them to dissolve in water.
NGSS AlignmentThis lesson helps students prepare for these Next Generation Science Standards Performance Expectations:
Materials required for the reaction activity including: a measuring cup, tape, spoon, scale, stopwatch, paper, water, and alka-seltzer tablets.
Materials for teacher preparation and demonstration:
Materials per group of 2–4 students:
Area of Science
Reaction rate, chemical reaction, surface area, collision theory
Svenja Lohner, PhD, Science Buddies
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