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QCM PH


Go to solution Solved by RaphLeLoup,

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Posted

Salut la populasse j'ai une petite question !! je comprend pas pourquoi l'item A est juste  😉 

 

 

Capture d’écran 2020-03-28 à 18.22.08.png

  • Solution
Posted

Salut !

Dans cette solution initiale, on a 10-3 mole d'un acide faible et autant de son sel de Na, soit de sa base.

On a donc [acide] = [base] donc pH=pKa= 4,75

VoilĂ  ! Bon courage pour la suite des rĂ©visions ! 😉

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