CHEM4 ACIDS & BASES MINDMAP

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  • Created by: mohz
  • Created on: 07-01-14 09:31
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  • CHEM4
    • Acids and Bases
      • Br0nsted-Lowery acids and bases
        • Acid = H+ Donor & Base = H+ Acceptor
      • pH of STRONG ACIDS
        • fully dissociated therefore just pH = -log [H+]
      • pH of STRONG BASES
        • ionic product of water, Kw = [H+][OH-] -- (rearrange)
      • Weak Acids and Bases
        • Expression for Ka and pKa = -logKa
      • pH of WEAK ACIDS
        • *Depends of values given*
          • pKa
            • pH = 1/2 pKa - 1/2 log[acid] (quick method)
    • Buffers
      • Applicatons
        • Calibrate pH meters in lab
        • Biochemical reasearch + Enzymes- correct conditions for Dyeing Fabrics
        • Shampoos containing acidic buffers
      • 2 types
        • Acidic buffers
          • Weak Acid + a Salt of its congugate base
        • Basic Buffers
          • Weak Base + a Salt of its congugate acid
      • pH of Acidic Buffers
        • *depends on value given*
          • pKa
            • pH = pKa + log [salt]/     [acid]
          • Ka
            • [H+] = Ka x [acid]/[salt]
      • Biological Buffers
        • e.g. pH of blood (H2CO3)

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