Acid Dissociation Constant: Mastery Check

i.  Given below are a series of pairs of compounds or ions together with their acid dissociation constants (Ka).  Determine the stronger acid in each pair.

  1. HCl (107), HNO3 (102)
  2. H2O (10-16), H3O+ (5 x 101)
  3. Cl3CCO2H (2 x 10-1), CH3CO2H (2 x 10-5)
  4. FCH2CO2H (3 x 10-3), ClCH2CO2H (1 x 10-3)
  5. CH3CO2H (2 x 10-5), C6H5CO2H (6 x 10-5 )
  6. CH3CO3H (6 x 10-9), CH3CO2H (2 x 10-5)
  7. C6H5NH2 (1 x 10-27), p-NO2C6H4NH2 (3 x 10-19)
  8. CH3SH (1 x 10-10), CH3OH (3 x 10-16)
  9. +NH4 (6 x 10-10), H2CO3 (5 x 10-7)
  10. HCO2H (2 x 10-4), C6H5CO2H (6 x 10-5)

answers

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