do you remember the clues for a chemical change?
TRANSCRIPT
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Do you Remember the Clues for a chemical change?
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• 1. New Colour• 2. Heat/Light • 3. Precipitate Forms• 4. Gases bubbles form• 5. Difficult to reverse
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• Chemical reactions can be desirable (good) or undesirable (bad)
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Desirable Reactions
1. Photosynthesis
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2. Cellular Respiration
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3. Fireworks
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4. Chlorine (in pool water keeps bacteria and algae populations under control),
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5. Toothpaste (sodium fluoride in toothpaste reacts in your mouth to rebuild enamel and control bacteria
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6. Soap and shampoo (has sodium or potassium which clean dirt and oils off your body
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Undesirable Reactions
1. Food Spoilage
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2. Rusting
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3. Acid Rain