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Chemical Reactions 7

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Transcript

  • 1. Chemical Reactions
  • 2. Physical vs. Chemical Rxn
    • Physical Rxn
    • Start with A and end with A
    • Chemical Rxn
    • Start with A and end with B
    • Bonds break
    • Bonds rearrange
    • New substances formed
  • 3. Signs of Chemical Rxn
    • Formation of Gas (bubbles)
    • Energy given off (light, sound, heat)
    • Color Change
    • Formation of a precipitate (solid produced in solution)
    • *These are indicators, but not a guarantee of a chemical rxn.
  • 4. H 2 SO 4 and Sugar (C 6 H 12 O 6 )
    • Was a gas formed?
    • Was Energy given off?
    • Was there a color change?
    • Did a precipitate form?
  • 5. Nitric Acid and Penny
    • Was a gas formed?
    • Was Energy given off?
    • Was there a color change?
    • Did a precipitate form?