Les formules (3) Flashcards

1
Q

Cm en

A

g/L

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2
Q

m en

A

g

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3
Q

V en

A

L

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4
Q

Cm

A

Concentration en masse

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5
Q

Cm (g/L) sans C =

A

m(g) / V(L)

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6
Q

C en

A

mol/L

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7
Q

C

A

Concentration en quantité de matière

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8
Q

n en

A

mol

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9
Q

C(mol/L) sans Cm =

A

n(mol) / V(L)

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10
Q

M en

A

g/mol

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11
Q

Cm(g/L) avec C=

A

C(mol/L) * M(g/mol)

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12
Q

M(g/mol) =

A

Cm(g/L) / C(mol/L)

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13
Q

C(mol/L) avec Cm =

A

Cm(g/L) / M (g/mol)

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14
Q

La spectrophotométrie

A

La couleur perçue d’une solution est la couleur complémentaire de celle absorbée.

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15
Q

Loi de Beer-Lambert

A

L’absorbance est proportionnelle à la concentration de soluté absorbant.

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16
Q

A=

A

k(L.mol‐¹)*C(mol.L‐¹)

17
Q

A

A

L’absorbance de la solution (sans unité)

18
Q

k

A

coefficient de proportionnalité (L.mol‐¹)

19
Q

C

A

concentration en espèce colorée (mol.L‐¹)

20
Q

Plus le nm est élevée…

A

Plus la couleur perçue est rouge