5.2 Lecture

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5.2 Lecture

  1. 1. 5.2 Reaction Types Pages 154 - 160
  2. 2. Goal 1 Distinguish among and recognize the 5 general types of chemical reactions
  3. 3. <ul><li>Synthesis Reaction </li></ul><ul><ul><li>Combines substances </li></ul></ul><ul><ul><li>**Two substances combine to make one </li></ul></ul>2 Na + Cl 2  2 Na Cl
  4. 4. <ul><li>Decomposition Reaction </li></ul><ul><ul><li>Breaks apart substances </li></ul></ul><ul><ul><li>**Big substance into many small substances </li></ul></ul>2 H 2 O  2 H 2 + O 2
  5. 5. <ul><li>Combustion Reaction </li></ul><ul><ul><li>Burning </li></ul></ul><ul><ul><li>**Look for O 2 and CO 2 and H 2 O </li></ul></ul><ul><ul><li>Organic molecule + Oxygen gas  CO 2 + water </li></ul></ul>CH 4 + 2 O 2  C O 2 + 2 H 2 O http://www.marymount.k12.ny.us/marynet/stwbwk05/05flashchem/lyreaction/lyreaction.html
  6. 6. <ul><li>Single Displacement Reaction </li></ul><ul><ul><li>One element switches spots </li></ul></ul><ul><ul><li>**one element and one compound </li></ul></ul>3 Cu Cl 2 + 2 Al  3 Cu + 2 Al Cl 3
  7. 7. <ul><li>Double Displacement Reaction </li></ul><ul><ul><li>Two elements switch spots </li></ul></ul><ul><ul><li>** Two compounds / partner swap </li></ul></ul>Pb (NO 3 ) 2 + K 2 (CrO 4 )  Pb (CrO 4 ) + 2 K (NO 3 ) Pb(NO3)2 + K2(CrO4)  Pb(CrO4) + 2 K(NO3)

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