Acids and Bases Key Definitions and Theory

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1. Depending on their formulae and bonding, different acids can

  • Release different numbers of protons
  • A proton donor
  • H2SO4: H2SO4(aq) ---> H+(aq) + HSO4-(aq) and HSO4-(aq) ---> H+(aq) + SO42-(aq)
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2. HCl, HNO3, H2SO4, HBr, HI and HClO4 are all _______ acids

  • Strong
  • Weak

3. As the [H+(aq)] for a strong acid is equal to the concentration of the acid, (therefore [H+(aq)] = [HA(aq)]) the pH

  • Can be easily calculated using pH = -log[H+(aq)]
  • Low

4. H3PO4 is a

  • Tribasic acid
  • H2SO4: H2SO4(aq) ---> H+(aq) + HSO4-(aq) and HSO4-(aq) ---> H+(aq) + SO42-(aq)

5. A large Ka value indicates a large extent of dissociation therefore

  • The acid is strong
  • The acid is weak
  • A small extent of dissociation therefore the acid is weak

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