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Tuesday, September 18

Chemical Reaction #1

Experiment #6 : Chemical Reactions

An experiment to illustrate that chemical reactions are a part of our daily life.


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.



as soon as water was added

15-min after

after 45 minutes
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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