Autoionization of Water

• Add a base, [H3O+] < [OH-]

  0.010 M NaOH (strong base, completely ionized)
  
  [H3O+][OH-] = 1.0 x 10-14
  [H3O+](0.010) = 1.0 x 10-14
  [H3O+] = 1.0 x 10-14 /0.010 = 1.0 x 10-12 M

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