e- Transfer Theory  Electrons move from the anode to the cathode (from the SRA to the SOA)

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Presentation transcript:

e- Transfer Theory  Electrons move from the anode to the cathode (from the SRA to the SOA)

Electrical Current (I)  The movement of electrons produces and electric current (I) which is measured in Amperes = 1 coulomb/sec.

Charge (Q)  Charge is the product of current and time (measured in coulombs) Q = It

 Q = charge in Coulombs  I = current in Amperes (coulombs/second)  t = time in Seconds

Faraday’s constant  The value of the electric charge carried by one mole of electrons (or the molar charge of electrons)  F = 9.65x10 4 C/mol e-

 The number of moles of e- can be found using electric charge and Faraday’s constant  n e- = Q F

Q = It  n e- = It F

 By finding the moles of electrons, we can find the mass of the product produced in a cell!!!

Example  To find the mass of copper produced by an electrolytic cell in 1 hour at 4.0A  Cu2+(aq) + 2e-  Cu(s)

Example 2:  In the electrolysis of silver, the electrolytic cell is operating at 5.00A. How long must it run to produce 4.0g of Ag(s) at the cathode?  Ag+(aq) + 1e-  Ag(s)