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Posted

Coucou je galère avec ce QCM si qqn passe par la merci d'éclairer ma lanterne.

 

Le pH d'une solution obtenue en mélangeant un litre d'acide acétique 1M , pKa = 4,74 avec 0,4 moles de soude solide est de

a_ 0,10

b _ 3,68

c_ 6,98

d_ 4,56

e _ 7,01 

 

item vrai est D 

Posted
il y a 51 minutes, Shika a dit :

Salut!

Je t'ai écrit la réponse, dis moi si tu as compris!

15517755375191053373248600603486.jpg

Merci bcp a toi je comprends mieux maintenant ! ?

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