Acid-Base Reaction • Kremil-S • Baking Soda • Vinegar Oxidation-Reduction Reaction - Betadine (or equivalent) -Vitamin C tablet (any brand) -Bleach (any brand) Experiment Guide Acid-Base Reaction 1. Dissolve a tablet of Kremil-S in a plastic cup with few amounts of water. Mix thoroughly. 2. Add one (1) tablespoon of vinegar to the mixture containing Kremil-S and observe the reaction. Take photo of the setup and the reaction. 3. In a separate setup, but at least five (5) tablespoons of baking soda inside the balloon using a funnel. 4. Add a half-filled cup of vinegar to the bottle and carefully stretch the balloon on top of the bottle. 5. Allow the baking soda to react with the vinegar by shaking the bottle and observe the reaction. Take photo of the setup and the reaction. Oxidation-Reduction Reaction 1. Prepare a small amount of vitamin C solution by dissolving one tablet with few amounts of water in a cup. Do the same thing (small amount of Vit C) for bleach powder. If you have liquid bleach, no preparation is needed. Label each cup accordingly. 2. Add dropwise amounts of Betadine solution while slowly stirring. Observe the reaction. Take photo of the setup and the reaction. Guide Questions 1. Summarize the experiments based on your own words.
Concept Overview
There are two types of changes matter can undergo physical change and chemical change. In a physical change, only the appearance or its phase of the matter change. One example is the melting of ice and the formation of steam when cooking. All these contain the same molecules of water.
On the other hand, chemical changes are processes in which the chemical identity of a substance is being replaced. This involves the transfer of electrons to form one compound to another. One example is the rusting of iron when exposed to moisture. Iron atoms in metals turn into rust (??2?3) which is chemically different from its precursor.
In the lecture, we emphasized the types of reactions a matter can undergo. It could be:
1. COMBUSTION REACTION – the breakdown of organic matter into simpler compounds such as carbon dioxide and water vapor. This is exothermic, meaning it produces energy in the form of heat.
2. PRECIPITATION REACTION – a type of reaction in which insoluble substances, called precipitates, are formed from aqueous substances.
3. ACID-BASE REACTION – a reaction between acids and bases to form neutral compounds such as salt and water.
4.
Materials Needed
• Clear plastic cups
• Water
• Bottle
• Balloon
• Funnel (you can improvise using a used PET bottle - water bottle)
Acid-Base Reaction
• Kremil-S
• Baking Soda
• Vinegar
Oxidation-Reduction Reaction
- Betadine (or equivalent)
-Vitamin C tablet (any brand)
-Bleach (any brand)
Experiment Guide
Acid-Base Reaction
1. Dissolve a tablet of Kremil-S in a plastic cup with few amounts of water. Mix thoroughly.
2. Add one (1) tablespoon of vinegar to the mixture containing Kremil-S and observe the reaction. Take photo of the setup and the reaction.
3. In a separate setup, but at least five (5) tablespoons of baking soda inside the balloon using a funnel.
4. Add a half-filled cup of vinegar to the bottle and carefully stretch the balloon on top of the bottle.
5. Allow the baking soda to react with the vinegar by shaking the bottle and observe the reaction. Take photo of the setup and the reaction.
Oxidation-Reduction Reaction
1. Prepare a small amount of vitamin C solution by dissolving one tablet with few amounts of water in a cup. Do the same thing (small amount of Vit C) for bleach powder. If you have liquid bleach, no preparation is needed. Label each cup accordingly.
2. Add dropwise amounts of Betadine solution while slowly stirring. Observe the reaction. Take photo of the setup and the reaction.
Guide Questions
1. Summarize the experiments based on your own words.
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