An experiment to illustrate that chemical reactions are a part of our daily life.
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| Materials Needed |
Materials needed:
* Household yeast
* Beaker or jar
* sugar
* warm water
* limewater
Procedure:
* Empty enough amount of yeast into a glass jar.
* Add 1tbsp sugar and 1/3 cup of warm water.
* Stir until smooth. Let the mixture stand for 45 minutes and examine:
1) What do you observe at the surface?
2) Describe the smell.
3) Test the gas produced by transferring some of the solution to some limewater. If CO2 is present, the water will become milky.
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| as soon as water was added |
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| 15-min after |
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| after 45 minutes |
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| added to limewater |
Findings:
* Sugar serves as a nutrient to the yeast to produce its energy.
* Product of this Chemical reaction is carbon dioxide and water.
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