Redox Reactions

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Redox Reactions

  1. 1. Redox Reactions
  2. 2. <ul><li>Reaction involving a transfer of electrons </li></ul><ul><li>Short for: reduction-oxidation reaction </li></ul>
  3. 3. Reduction and oxidation never occur separately
  4. 4. Reduction <ul><li>Charge of metal is reduced. </li></ul><ul><li>Metal cation GAINS electron(s) to become a neutral metal. </li></ul>
  5. 5. Ex. Reduction half-reaction
  6. 6. Oxidation <ul><li>Neutral metal LOSES electron(s) to become a metal cation. </li></ul>
  7. 7. Ex. Oxidation half-reaction
  8. 8. Breathalyzer Test Application of oxidation Alcohol -> Acid + Water <ul><li>Alcohol in blood is released through capillaries </li></ul><ul><li>Air from lungs enters machine and is oxidized </li></ul><ul><li>Loss of electrons </li></ul><ul><li>Current produced </li></ul><ul><li>Machine converts current into numeric reading </li></ul>Image: http://www.alcohol-breathalyzer-test.com/images/HAN01.1.jpg
  9. 9. OIL RIG
  10. 10. Write the following half-reactions : <ul><li>reduction of lead (II) ions </li></ul><ul><li>oxidation of elemental silver to Ag + </li></ul>
  11. 11. For the following reaction: <ul><li>What is reduced? </li></ul><ul><li>What is oxidized? </li></ul><ul><li>Write both half-reactions </li></ul>
  12. 12. Hint: Re-write with only the metals and metal cations.

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