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  • Created by: emma plow
  • Created on: 08-04-13 14:13
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  • Acids and bases
    • Bronste lowry acids and bases
      • an acid is a substance that can donate a proton. A base is a substance that can accept a proton.
      • water = amphoteric . forms oxonium ion with acid and acts as an acid with bases
        • slightly ionised - 1 water molecule gives a proton to another forming H+ and OH-
          • [H]+ = 1.0x10-7 = [OH]-
    • PH
      • -log10 [H+]
        • smaller ph = more H+
    • Untitled
  • PH of water different at different temberatures, as dissociation is endothermic.
    • smaller ph = more H+
    • slightly ionised - 1 water molecule gives a proton to another forming H+ and OH-
      • [H]+ = 1.0x10-7 = [OH]-
    • always neutral however as OH- concentration always equals H+ concentration
  • buffer solutions
    • Acids and bases
      • Bronste lowry acids and bases
        • an acid is a substance that can donate a proton. A base is a substance that can accept a proton.
        • water = amphoteric . forms oxonium ion with acid and acts as an acid with bases
        • PH
          • -log10 [H+]
          • Untitled
        • Keep concentration of hydrogen ions and hydroxide ions almost unchanged

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