Concentración de soluciones en unidades químicas.
Quiz
•
Chemistry
•
10th Grade
•
Medium

Leonor Camacho
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6 questions
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1.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
Una solución de NaOH se preparó disolviendo 26 gr del soluto en agua hasta obtener un total de 430 ml de solución. Na = 23 u.m.a. ; O = 16 u.m.a. ; H = 1 u.m.a.
La concentración de la solución preparada es
15,1M
1,51M
0,151M
2.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
¿Cuántos gramos de NaCl se requieren para preparar 600 ml de solución 2M?
Na = 23 u.m.a ; Cl = 35,4 u.m.a.
2,000 gr de NaCl
0,200 gr de NaCl
0,020 gr de NaCl
3.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
La molalidad de una solución de azúcar en la que se emplearon 1,5 moles del soluto y 390 gr de agua, es
3,84 m
0,384 m
38,4 m
4.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
Si una solución está formada por 5 moles de soluto y 49 moles de solvente, entonces la fracción molar del soluto y la fracción molar del solvente son respectivamente:
0,90 y 0,09
0,9 y 0,9
0,09 y 0,90
5.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
La sustancia con mayor solubilidad a 20°C es
K2CrO4
NaCl
KNO3
6.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
A 60°C, la sustancia que presenta una solubilidad de 50 gr/100 ml de agua es
NaCl
Ce2(SO4)3
K2CrO4
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