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Chemical Reactions 7

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Chemical Reactions 7

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

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