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Chimie - Coefficient de dissociation

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Chemistry Flashcards on Chimie - Coefficient de dissociation, created by Hamza Vitsh on 06/02/2017.
Hamza Vitsh
Flashcards by Hamza Vitsh, updated more than 1 year ago
Hamza Vitsh
Created by Hamza Vitsh about 8 years ago
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Question Answer
Le coefficient de dissociation d'un acide:α --------------------------------------------------------- Exemple HA + H2O ---> A- + H3O+ C0*V/En excès | 0 / 0 C0*(1-α)*V/En excès | C0*α*V/C0*α*V Alors Ka = [A-]*[H3O+]/[HA] -------> Ka = C0^2*α^2/C0*(1-α) -------> Ka =C0*α^2/(1-α) N.b : L'hydrolyse β d'une base A- est le même. Et simplement : α = N(initial)-N0/N(initial) --------> α = N(disparu)/N(initial)
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