Grade 8 Science Experiment 5 - Using a Catalyst in a Chemical Reaction
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Purpose:
The purpose of this science fair project is to demonstrate how a catalyst can be used to affect the speed of a chemical reaction. A catalyst is a substance, solution, or variable that changes and increases the rate of a chemical reaction. In other words, a catalyst speeds up a chemical reaction.
Alka-seltzer tablets consist of citric acid (sour salt), sodium bicarbonate (baking soda), and aspirin.
Hypothesis: An increase in temperature will speed up the chemical reaction. Therefore, the hot water will provide the quickest catalyst and dissolve the Alka-Seltzer table before the lukewarm and cold water environments.
Variables:
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- Temperature of the water - hot, lukewarm, cold
- Plain water in drinking glasses
- Baking powder and water in the drinking glasses
- Baking soda, sour salt, and water in the drinking glasses
Materials Needed:
- Three Alka-Seltzer tablets
- Baking powder
- Baking soda (sodium bicarbonate)
- Citric Acid (Sour salt)
- Water
- Three drinking glasses
- Note cards
- Tape
- Marker
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