This project demonstrates the iodine clock reaction, where a sudden color change indicates the end of a chemical reaction. By varying concentrations, students can learn about reaction rates and kinetics in a fun and colorful way.
If the concentration of reactants increases, then the time taken for the color change will decrease, demonstrating the effect of concentration on reaction rate.
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Prepare solutions of potassium iodide and hydrogen peroxide in separate beakers.
Add starch solution to the potassium iodide solution.
Mix the solutions together and start timing immediately.
Observe the time taken for the color change to happen.
Vary the concentrations of the reactants and repeat the process.
Record the time taken for each concentration.
Analyze how concentration affects the reaction rate.
Summarize findings and discuss the significance of reaction kinetics.
You will observe that as the concentration of reactants increases, the time taken for the color change decreases, illustrating the relationship between concentration and reaction rate in chemical kinetics.
Concentration of reactants
Time taken for color change
Temperature of solutions, Volume of solutions, Type of starch used
Handle all chemicals with care and wear safety goggles during experiments to avoid irritation.
Demonstrate the reaction live to capture audience interest.
Use clear visuals and graphs to represent your findings.
Explain the science behind reaction kinetics.
Engage the audience by discussing real-life applications.
