
pH et Incertitude
Authored by دغوغي ليلى
Chemistry
12th Grade

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15 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Quelle est la définition du pH d'une solution aqueuse?
Le pH est une mesure de la densité de la solution
Le pH indique la couleur de la solution
Le pH mesure la température de la solution
Le pH d'une solution aqueuse mesure l'acidité ou la basicité de la solution sur une échelle de 0 à 14.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Comment calcule-t-on le pH d'une solution?
pH = -log[H+]
pH = log[H+]
pH = -[H+]
pH = [H+]
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Quels sont les différents moyens de mesurer le pH d'une solution?
bandelettes de papier indicateur pH, électrodes de verre couplées à un pH-mètre, indicateurs colorés, solutions tampons
pH-mètre électronique, thermomètre, balance de cuisine
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Quels facteurs peuvent influencer le pH d'une solution?
Le parfum de la solution
Le nombre d'électrons présents
La couleur de la solution
La concentration en ions H+, la concentration en ions OH-, la température, la pression, et la présence de sels dissous.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Comment calcule-t-on l'incertitude de pH?
incertitude de pH = 0.059 / (10^pH)
incertitude de pH = 0.059 * (10^pH)
incertitude de pH = 0.059 + (10^pH)
incertitude de pH = 0.059 - (10^pH)
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Quelle est la formule mathématique pour le calcul du pH?
pH = [H+]
pH = log[H+]
pH = -[H+]
pH = -log[H+]
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Quel est le pH d'une solution neutre?
5
10
3
7
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