Summary of important chemical/physical reactions throughout the whole experiment:
1. Dissolution of Sugar in Water:
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Type: Physical process (dissolution)
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Explanation: Sugar (sucrose) dissolves in water to form a homogeneous solution. This is not a chemical reaction but a physical change where sugar molecules disperse in water.
2. Ionization of Citric Acid:
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Type: Acid dissociation (chemical reaction)
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Explanation: Citric acid is a weak acid and partially ionizes in water, releasing hydrogen ions (H+) and citrate ions. This contributes to the sour taste of the soda.
3. Reaction of Baking Soda with Citric Acid:
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Type: Acid-base reaction (neutralization)
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Explanation: Baking soda (sodium bicarbonate, NaHCO3) reacts with citric acid to produce carbon dioxide gas (CO2), water, and sodium citrate. The carbon dioxide gas creates the fizziness in the soda.
4. Release of Carbon Dioxide from Carbonated Water:
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Type: Decomposition reaction
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Explanation: Carbonated water contains dissolved carbonic acid (H2CO3), which decomposes into carbon dioxide gas and water. This contributes to the effervescence of the soda.
