Acide Base Flashcards

1
Q

def

A

AH acide : donneur de protons
A- base : accepteur

ph = -log [H3O+]
[H3O+] = 10^-pH
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2
Q

Acide fort de concentration Co (lié à une base neutre)

A

pH = -log Co

ex: HCl: chloridrique
HNO3: nitrique
H2SO4: sulfurique

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3
Q

Base fort de concentration Co

A

pH = 14 + log Co

ex: NaOH : soude
KOH: potasse

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4
Q

Acide faible con=Co et de valeur pka

A

pH = 1/2 (pKa -log Co)

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5
Q

Base faible con=Co et de valeur pka

A

pH = 1/2 (14 + pKa + log Co)

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6
Q

soit le couple AH/A-
melange acide AH et base A-

equation d’henderson-hasselback

A

pH = pka + log (A-/AH)

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7
Q

ampholyte en solution

A

pH = (pKa1 + pKa 2) / 2

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8
Q

Autoprolyse de l’eau

A

K(H20) = 10^-14

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9
Q

coefficient de dissociation

A
alpha = avancement / concentration initial
alpha = x/Co
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10
Q

pkA d’une basse d’un AA

pkA d’un acide d’un AA

A

2

9

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11
Q

si pkA<0

A

fort

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12
Q

si 0 < pka <14

A

faible

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13
Q

K=

A

K= (K acide)/ (K de la base)

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