Forces des acides
Quiz
•
Chemistry
•
12th Grade
•
Medium
Thomas Baliros
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11 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Le taux d'avancement final de la transformation entre un acide faible et l'eau est :
supérieur à 1
inférieur à 1
égal à 1
égal à 2
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
La constante d'acidité d'un couple AH/A- est associé à la réaction :
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Plus le pKA d'un couple acide-base est petit :
plus l'acide du couple est fort
plus la base du couple est forte
plus l'acide du couple est faible
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Un acide -aminés contient les groupes :
carbonyle et amine
carbonyle et amide
carboxyle et amine
carboxyle et amide
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Le pKA du couple HCOOH/HCOO- est de 3,8. A un pH de 5 :
HCOOH prédomine
HCOO- prédomine
Les espèces sont en quantités égales
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Le pH d'un milieu comportant une solution tampon varie peu si :
on dilue modérément
on ajoute une grande quantité d'acide fort
on ajoute une grande quantité de base forte
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Le pH d'une solution d'acide nitrique HNO3 de concentration c=1,0x10-3 mol.L-1 vaut 3,00
HNO3 est un acide fort
HNO3 est un acide faible
HNO3 est une base forte
HNO3 est une base faible
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