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QUIZ

Question 1/12
Si pH = 4 alors :
  [H3O+] = 10−4  et [OH−] = 10−10
  [H3O+] = 10−10  et [OH−] = 10−4
  [H3O+] = 10−7  et [OH−] = 10−7
  [H3O+] = 10−4  et [OH−] = 10−8