Méthode physique d'analyse d'un système chimique Flashcards

1
Q

pH =

A

-log ( [H3O+]/ Co)

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2
Q

Si [H3O+] est divisé par 10 alors

A

le pH augmente de 1

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3
Q

[H3O+]/Co =

A

Log (-pH)

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4
Q

Absorbance =

A

epsilon lambda * l * C = k * c

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5
Q

epsilon lambda dépend de

A

la nature de la molécule qui absorbe et est variable que pour une seule longueur d’ode

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6
Q

on se met à lambda max car

A

c’est la où l’incertitude sur l’absorbance est la plus petite

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7
Q

C = O

A

1700 cm-1

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8
Q

C - H

A

3000 cm-1

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9
Q

OH

A

3600 cm-1

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10
Q

ester

A

1200 cm-1

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11
Q

Loi d’ohm

A

U = R * I

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12
Q

sigma (conductimétrie) =

A

somme d°i * [Xi]

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13
Q

d°i (avec l’unité)

A

conductivité molaire en S/mol

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14
Q

constante de cellule

A

k = l/S

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