
Calcul de concentration
Authored by Karine Robert
Chemistry
3rd Grade
Used 55+ times

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14 questions
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1.
FILL IN THE BLANK QUESTION
5 mins • 1 pt
Une solution salée contient 15 % (m/v) de sel. Quelle quantité de sel y a-t-il si la solution a un volume de 3 L? (Indiquez les unités dans votre réponse.)
2.
FILL IN THE BLANK QUESTION
5 mins • 1 pt
La recette d'un chocolat chaud indique qu'il faut utiliser 4,5 g de poudre au chocolat pour obtenir 350 ml de boisson. Quelle est la concentration en poudre au chocolat de la boisson en % (m/v)? (Indiquez les unités dans votre réponse.)
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Complète la phrase suivante: «La concentration est le rapport entre (1) et la quantité totale de (2).
(1) soluté (2) solvant
(1) soluté (2) solution
(1) solvant (2) solution
(1) solvant (2) soluté
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Complète la phrase suivante: «Si la quantité de solvant augmente et que la quantité de soluté demeure la même, alors le volume de la solution totale (1) et la concentration du soluté. (2) »
(1) diminuera (2) diminuera
(1) diminuera (2) augmentera
(1) augmentera (2) diminuera
(1) augmentera (2) augmentera
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
On retrouve 60 mg de sel de table (NaCl) dans un volume de 250 mL d'eau. Quelle est cette concentration en g/L?
0,24 g/L
0,024 g/L
240 g/L
24 g/L
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Quelle masse de cortisone retrouve-t-on dans ce tube de crème?
15 g
0,033 g
3,33 g
0,075 g
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
S’il y a 18,46 mL d’alcool dans cette bouteille, quelle est le volume total de cette bière?
95,99 mL
960 mL
355 mL
542 mL
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