
Acide base et pH
Quiz
•
Chemistry
•
11th Grade
•
Hard
prof physchimie
Used 1+ times
FREE Resource
20 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Un acide est une espèce chimique capable de :
céder un proton H+
capter un proton H
capter un électron
céder un électron
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Si la concentration en ions oxonium H3O+ dans une solution augmente alors
le pH de la solution diminue
le pH de la solution augmente
la solution est plus acide
la solution est moins acide
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
la molécule d'eau H2O est la base du couple
H3O+/H2O
H+/HO-
H2O/HO
H2O+/H2O
4.
FILL IN THE BLANK QUESTION
30 sec • 1 pt
La méthylamine CH3NH2 est une base. Ecrire la formule de l'acide conjugué. (majuscules)
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Les couples acide-base intervenant dans l'équation NH3 + H2O → NH4+ + HO- sont :
NH4+/NH3 et H2O/HO-
NH4+/H2O et HO-/NH3
NH3/NH4+ et HO-/H2O
NH4+/NH3 et HO-/H2O
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
L'ion amonium NH4+ est un acide. Lors de sa réaction avec la base H2O, il y a formation :
du dioxyde d'azote N2O
d'ions oxonium H3O+
d'ions hydroxyde HO-
d'ammoniac NH3
7.
FILL IN THE BLANK QUESTION
30 sec • 1 pt
La concentration en ions H3O+ dans une solution est égale à 4,2x10-3mol.L. Indiquer la valeur de son pH avec 1 chiffre après la virgule.
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