MCAT Chemistry Question — Faraday
- Jul 01, 2014
- Chemistry, MCAT Blog, MCAT Chemistry
When 1 mole of Cu2+(aq) is reduced to Cu (s), how many faraday of charge are required?
C) 6.02 x 1023
D) none, charge is measured in Coulombs (C)
Faraday is a measure of 1 mole of electric charge equal to approximately 1 x 105 coulomb. In this question, 2 moles of electrons are required for the reduction, b) is correct.
A) 1, incorrect, 2 moles of charge are required.
B) 2, correct.
C) 6.02 x 1023, incorrect, Although this is the number of electrons in a mole of electrons, the faraday is a measure of 1 mole of charge.
D) none, charge is measured in Coulombs (C), incorrect, Although charge is measured in coulomb’s, it is also (less commonly) measured in faraday. Either unit may appear on the MCAT.
Search the Blog
Free ConsultationSchedule Now
MCAT Blog How to Review MCAT Full-Lengths
Free MCAT Practice AccountNeed great MCAT practice?
Get the most representative MCAT practice possible when you sign up for our free MCAT Account, which includes a half-length diagnostic exam and one of our full-length MCAT practice exams.Learn More