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6.3 6.4 Acids & Bases

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6.3 6.4 Acids & Bases

  1. 1. 6.3 – 6.4 Acids & Bases Pages 199 - 212
  2. 2. Goal 1 Compare and contrast the characteristics of acids and bases
  3. 3. <ul><li>Acids </li></ul><ul><li>1. Taste sour </li></ul>
  4. 6. Kool-aid pickles!!
  5. 8. <ul><li>2. Donates Hydrogen ions H + </li></ul><ul><li>3. Forms Hydronium ions H 3 O + </li></ul><ul><li>Products of a chemical reaction will show H 3 O </li></ul>
  6. 9. <ul><li>Products of a chemical reaction will show H 3 O </li></ul><ul><li>HCl + H 2 O  H 3 O + + Cl - </li></ul>
  7. 10. <ul><li>4. Turns Blue litmus paper </li></ul><ul><li>to RED </li></ul>
  8. 11. <ul><li>5. It Burns skin and tissue </li></ul>
  9. 12. <ul><li>6. Conducts electricity </li></ul>
  10. 13. <ul><li>Want to see something cool? </li></ul><ul><li>Copy this link to your browser </li></ul><ul><li>http://pickle.xr.ca/ </li></ul>
  11. 14. <ul><li>7. Crystalline Solid </li></ul>
  12. 15. <ul><li>Examples </li></ul>Battery acid Stomach acid
  13. 16. <ul><li>Bases </li></ul><ul><li>1. Tastes Bitter </li></ul>
  14. 17. <ul><li>2. Hydroxide ions OH - </li></ul>KOH  K + + OH - NH 3 + H 2 O  NH 4 + + OH -
  15. 18. <ul><li>3. Turns Red litmus paper </li></ul><ul><li>to BLUE </li></ul>
  16. 19. <ul><li>4. Corrosive (feels slippery) </li></ul>
  17. 20. <ul><li>5. Can also conduct electricity </li></ul>
  18. 21. <ul><li>Examples </li></ul><ul><li>Sodium hydroxide pellets </li></ul>
  19. 22. Goal 2 Relate the pH value to the concentration and strength of a dissolved acid or base
  20. 23. <ul><li>pH measures hydronium ions (H 3 O + ) </li></ul>
  21. 24. <ul><li>Comparative concentrations </li></ul>A lot A little 14 = = 7 A little A lot 0 Hydroxide ions (base) Hydronium ions (acid)
  22. 25. <ul><li>Concentration changes by powers of 10 </li></ul><ul><li>pH =1 has 10x more than pH = 2 </li></ul><ul><li>pH = 1 has 100x more than pH = 3 </li></ul><ul><li>More  Less </li></ul><ul><li>1 2 3 4 5 6 7 8 9 10 11 12 13 14 </li></ul>
  23. 26. Goal 3 Identify the products of neutralization reactions
  24. 27. <ul><li>Acid + Base  water </li></ul><ul><li>H 3 O + + OH -  H 2 O </li></ul>
  25. 28. <ul><li>Acid + Base  water + salt </li></ul><ul><li>H 3 O + + Cl - + Na + + OH -  2 H 2 O + Na + + Cl - </li></ul>
  26. 29. <ul><li>H 3 O + + Cl - + Al + + OH -  ___ + ___ + __ </li></ul>
  27. 30. <ul><li>H 3 O + + Cl - + Na + + OH -  2 H 2 O + Al + + Cl - </li></ul>
  28. 31. <ul><li>KOH + HNO 3  ___+ ___+___ </li></ul>
  29. 32. <ul><li>KOH + HNO 3  H 2 O + K + + NO 3 - </li></ul><ul><li>Is it balanced? </li></ul>
  30. 33. <ul><li>Must have = amounts of </li></ul><ul><li>hydronium and hydroxide ions </li></ul><ul><li>to completely neutralize </li></ul>
  31. 34. Goal 4 Explain how common acidic and basic household substances work
  32. 35. <ul><li>Soap = basic </li></ul><ul><li>surrounds oily substances </li></ul><ul><li>allows emulsion in water </li></ul><ul><li>Whisked away! </li></ul>
  33. 36. <ul><li>Detergents = basic </li></ul><ul><li>lather in hard water </li></ul><ul><li>do not form soap scum </li></ul>
  34. 37. <ul><li>Ammonia = basic </li></ul><ul><li>emulsifies oil </li></ul><ul><li>whisked away! </li></ul>
  35. 38. <ul><li>Bleach = basic </li></ul><ul><li>Disinfectant </li></ul><ul><li>kill bacteria & viruses </li></ul>
  36. 39. <ul><li>Thanks to the following people who have generously shared their images on the creative commons of Flickr: </li></ul><ul><li>Progoddess…I love lemon & peppermint </li></ul><ul><li>Frotzed2… gave your kid a lemon  </li></ul><ul><li>Bunchofpants… pickle on a fork </li></ul><ul><li>Brad Lauster… Big Papa </li></ul><ul><li>G.J. Charlet III… hey kool-aid! </li></ul><ul><li>Interplast… acid burn </li></ul><ul><li>Duchamp… electric pickle </li></ul><ul><li>Deanj… Old ray-o-vacs </li></ul><ul><li>Wallyg… Homer!! </li></ul><ul><li>Jemsweb… walnut </li></ul><ul><li>Greg McElhatton… unsweetened chocolate </li></ul><ul><li>Santoslilhelper… slippery when wet </li></ul>
  37. 40. <ul><li>Thanks to the following people who have generously shared their images on the creative commons of Wikipedia: </li></ul><ul><li>Walkerma… sodium hydroxide pellets </li></ul>

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