
oxydoreduction
Authored by Christine MORTAGNE
Chemistry
11th Grade
Used 53+ times

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10 questions
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1.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Un réducteur est une entité chimique qui:
perd des électrons
gagne des électrons
peut subir une oxydation
peut subir une réduction
2.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Un oxydant est une entité chimique qui:
perd des électrons
gagne des électrons
peut subir une oxydation
peut subir une réduction
3.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Un oxydant est:
un accepteur d'électrons
un donneur d'électrons
un anion
un cation
4.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Cocher la bonne écriture d'une demi-réaction d'un couple redox.
Ox ⇌ Red + ne-
Ox + ne-⇌ Red
Red + Ox ⇌ ne-
Ox + m H+ ⇌ b Red + q H2O
5.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Cocher la bonne écriture pour la demi-équation du couple Cl2/Cl-(aq)
Cl2 + e- ⇌ Cl-(aq)
2Cl-(aq) + 2e- ⇌ Cl2
Cl2 + 2e- ⇌ 2Cl-(aq)
2Cl-(aq) + e- ⇌ Cl2
6.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Cocher la bonne écriture pour la demi-équation du couple H2O2(aq)/H2O(l)
e- + H2O2(aq) ⇌ H2O(l) + O-(aq)
H2O2(aq) + 2H+(aq) + 4e- ⇌ 2H2O(l)
H2O2(aq) ⇌ 2H2O(l) + 2H+(aq) + 2e-
H2O2(aq) + 2H+(aq) + 2e- ⇌ 2H2O(l)
7.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Quelle espèce chimique joue le rôle de réducteur dans la demi-équation suivante:
ClO4-(aq) + 2H+(aq) + 2e- ⇌ ClO3-(aq) + H2O(l)
ClO4-(aq)
H+(aq)
ClO3-(aq)
H2O(l)
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