Etat d'équilibre d'acido-basique Flashcards

1
Q

pH
Acide Aminé

A

½ (pKa1 + pKa2)

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2
Q

pH
Solution tampon

A
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3
Q

Contante d’équilibre entre 2 couples
Avec Ka

A
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4
Q

Constante d’équilibre
avec pKa

A
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5
Q

Quand est-ce qu’un réaction est totale

A

K > 10<strong>4</strong>

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6
Q

pH(eau pure)

A

½ pKe =7 à 25°C

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7
Q

Ke

A

10-14

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8
Q

Racine Carré Ke

A

10-7

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9
Q

pH
Acide fort

A

-log Co<br></br>Validité : milieu acide si pH < 6,5

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10
Q

pH
Base Forte

A

pKe + log Co = 14 +log Co

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11
Q

pH
Acide Faible

A

½ (pKa - log Co)
Validité :
• 1ere approximation: milieu acide
• 2eme approximation : acide faiblement dissocié

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12
Q

Acide Faible
Condition de validité

A

Validité :
• 1ere approximation: milieu acide
• 2eme approximation : acide faiblement dissocié
pH < pKa -1

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13
Q

Coefficient de dissociation
Acide faible

A
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14
Q

Coefficient de dissociation
Base faible

A
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15
Q

pH
Base faible

A
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16
Q

pH
Ampholyte

A

½ (pKa1 + pKa2)
Le Ph est indépendant de la concentration de l’ampholyte

17
Q

pH
Mélange contenant acide faible et base faible

A

½ (pKa1 + pKa2)

18
Q

Réalisation solution tampon

A

• Acide Faible +
- Sel NaA (base faible)
-Base forte (OH-)
• Base Faible A- (sel NaA) + Acide fort

19
Q

Dosage Acide Fort et Base Forte
K

A

1014

20
Q

Dosage acide faible et base forte
K

A

10pKe-pKa

21
Q

Dosage Acide Fort et Base Forte
Avant l’équivalence

A
22
Q

Dosage Acide Fort et Base Forte
Après l’équivalence

A
23
Q

Dosage Acide Fort et Base Forte
A l’équivalence

A

pH =7

24
Q

Dosage acide faible et base forte
A l’équivalence

A
25
Q

Dosage acide faible et base forte
Après l’équivalence

A
26
Q

Dosage acide faible et base forte
Avant l’équivalence

A