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Factors Affecting Reaction Rate

Factors Affecting Reaction Rate
Factors Affecting Reaction Rate
Factors Affecting Reaction Rate
Factors Affecting Reaction Rate
Factors Affecting Reaction Rate
Factors Affecting Reaction Rate
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Product Description
This is a very unique, creative, and awe-inspiring lesson thanks to a very entertaining high school themed detective story (of sorts) and the iodine clock reaction, which is so freaking cool. The kids think it's magic every year.

First, reaction rate is defined and described, and concentration of reactants is discussed as a factor that influences reaction rate. This is when you do the iodine clock reaction. The "recipe" is below for you.

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IODINE CLOCK REACTION

Chemical A
• 400 mL. distilled water
• 1.6 grams of KIO3 (potassium iodate)

Chemical B
• 320 mL distilled water
• 1.6 g powdered starch (add a little water and make into paste)
• 1 g Na2S2O5 (sodium metabisulfite)
• 2 mL concentrated H2SO4 (sulfuric acid)
Add starch to 320 ml boiling water, and boil for two minutes. When solution is cool to the touch, add the sodium metabisulfite and sulfuric acid. Then, add an additional 500 mL of distilled water to the solution.

Demonstration Procedures
• Pour 50 mL of Chemical A and 50 mL of Chemical B into the same flask.
• Mix 35 mL of Chemical A with 15 mL of distilled water and 50 mL of Chemical B.
• Mix 15 mL of Chemical A with 35 mL of distilled water and 50 mL of Chemical B.

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Next, students read a fun story and analyze a set of data to identify several factors that all influence the rate of a chemical reaction. It's really fun for them, and the teacher barely has to do anything but a demonstration.

Students learn that concentration, temperature, presence of a catalyst, stirring, ionic character, and particle size all affect the rate of a chemical reaction.

Most of my chemistry lessons are 8 slide PowerPoints. I print the PowerPoints each day (4 slides per page... front and back = 1 sheet of paper per student). The students then fill out the answers to my guided and scaffolded questions as I fill them out on the SmartBoard. My teaching style is highly interactive, and my lessons support that style.

All lessons include a Do Now, Mini Lesson, Pair Up, and Summary to keep students moving and engaged.

To remove the "Wickline" watermark, select the Watermark from the Insert menu, then select No Watermark. You cannot remove the watermark's from .pdf files and SmartBoard files, so you'll have to make new ones from your fresh watermark-less Microsoft file.


Science Education by Joshua Wickline is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 United States License.
Total Pages
N/A
Answer Key
N/A
Teaching Duration
45 minutes
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