
Ejercicios ácidos y bases
Quiz
•
Chemistry
•
12th Grade
•
Practice Problem
•
Medium
Julia martin almansa
Used 2+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
2023 Julio B4 a) La biotina es un ácido monoprótico, HA. Una disolución de biotina 0,010 M tiene un pH de 3,3. Determine la constante de disociación y el grado de disociación.
Ka=2,6x10-5
α= 5%
Ka=3x10-5
α= 4%
Ka=3x10-5
α= 5%
Ka=2,6x10-5
α= 4%
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
2023-Julio B.4 b) Determine el volumen de una disolución de hidróxido de sodio 0,050 M necesario para neutralizar 100 mL de la disolución de HA.
0,04 L de NaOH
0,2 L de NaOH
0,02 L de NaOH
0,04 L de NaOH
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
2023-Junio A.3 a1)En un laboratorio se tiene un matraz A, que contiene 15 mL de una disolución acuosa de ácido clorhídrico 0,050 M, determine el pH
pH = 1,5
pH = 2,1
pH = 1,8
pH = 1,3
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
2023-Junio A.3 a2)En un laboratorio se tiene un matraz B, que contiene 15 mL de una disolución acuosa de ácido acético 0,050 M, determine el pH
pH = 3,0
pH = 3,5
pH = 2,8
pH = 4,6
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
2023 Junio A3 b) Calcule la cantidad de agua que se debe añadir a la disolución más ácida para que el pH de las dos disoluciones sea el mismo. Suponga volúmenes aditivos.
V = 798 mL
V = 879 mL
V = 987 mL
V = 897 mL
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
2023-Modelo A.3 a1) Para la sustancia NH4+, justifique cuál es su base o ácido conjugado, escribiendo el equilibrio.
NH4+ ⇄ NH3 + H+ , y su base conjugada es NH3.
NH52+ ⇄ NH4+ + H+ , y su ácido conjugado es NH52+
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
2023-Modelo A.3 a2) Para la sustancia Cl-, justifique cuál es su base o ácido conjugado, escribiendo el equilibrio.
Cl- ⇄ HCl + H+ , y su base conjugada es HCl
Cl- + H+ ⇄ HCl , y su ácido conjugado es HCl
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