Acide Base Flashcards

1
Q

Nom d’acide qui a 2 pKa

A

Diacide

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2
Q

Acide fort

A

pKa < 0

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3
Q

Af

A

0 < pKa < 14

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4
Q

BF

A

PKa > 14

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5
Q

Bf

A

0 < pKa < 14

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6
Q

Formule PH solution tampon

A

PH = pKa + log (A/AH)

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7
Q

PH AF

A

PH = - log Co

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8
Q

PH Af

A

1/2 pKa - 1/2 log Co

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9
Q

PH BF

A

PH= 14 + log Co
= 14 + log [OH]

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10
Q

Ph Bf

A

PH= 7 + 1/2 pKa + 1/2 log Co

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11
Q

PH diacide ?

A

On utilise la 1ere constante de dissociation pKa1
pKa1 < 0 : pH = -log Co (AF)
pKa2 > 0: pH = 1/2 pKa - 1/2 log Co (Af)

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12
Q

PH amphotère ?

A

pH = 1/2 (pKa1 + pKa2)

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13
Q

Si pH < pKa

A

Alors forme acide prédomine

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14
Q

Si pH > pKa

A

Forme basique prédomine

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15
Q

Si pH = pKa

A

Alors concentration forme acide = concentration forme basique

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