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SOLUTIONS AQUEUSES
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soluté solvant
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10 g sel 500 mL eau
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n = ? V= 500 mL
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PAR DISSOLUTION D’UN COMPOSE SOLIDE
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KMnO 4 158 g/mol 0,05 mol/L 100 mL = 0,100 L m = M C V [g] [g.mol -1 ] [mol.L -1 ] [L] m = M C V [g] [g.mol -1 ] [mol.L -1 ] [L] m = M C V= 158 0,05 0,100 = 0,79 g
![KMnO g/mol 0,05 mol/L 100 mL = 0,100 L m = M C V [g] [g.mol -1 ] [mol.L -1 ] [L] m = M C V [g] [g.mol -1 ] [mol.L -1 ] [L] m = M C V= 158 0,05 0,100 = 0,79 g](http://images.slideplayer.com/12/4102766/slides/slide_11.jpg "KMnO g/mol 0,05 mol/L 100 mL = 0,100 L m = M C V [g] [g.mol -1 ] [mol.L -1 ] [L] m = M C V [g] [g.mol -1 ] [mol.L -1 ] [L] m = M C V= 158 0,05 0,100 = 0,79 g")
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0,79 g
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PAR DILUTION D’UNE SOLUTION EXISTANTE
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Soluté : mère fille C 0 = C 1 = V 0 = V 1 = Soluté : mère fille C 0 = C 1 = V 0 = V 1 = KMnO 4 0,05 mol/L 0,005 mol/L 100 mL ? n 0 = n 1 C 0 V 0 = C 1 V 1 10 mL
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