Electrochemistry Voltaic Cells

Cathode

electrode in an electrical device where REDUCTION (gain of electrons) occurs

Anode

electrode in an electrical device where OXIDATION (loss of electrons) occurs

How do you construct a voltaic cell?

you need two half-cells, each consisting of a metal electrode submerged in a solution of its metal salt. the two half-cells are connected by a salt bridge, which allows ions to flow between the solution, completing the circuit

how do you calculate cell potential under standard conditions?

you used the equation E knot cell = E knot cathode - E knot anode

What is the Nernst equation?

E cell = E knot cell - (RT/f)/n x LogQ

Define the variables in the Nernst equation.

E cell is the cell potential under non-standard conditions

E knot cell is the standard cell potential

R is the universal gas constant

T is the temperature in Kelvin

n is the number of electrons transferred in the balanced redox reaction

F is the faraday constant

Q is the reaction quotient

In which direction do electrons flow in a voltaic cell?

from higher potential energy to lower potential energy

N always equals what number

2