unit 4 electrochemistry

electrons move away from the ____ and toward the ___

negative charge ; positive

anode

the electrode where oxidation occurs

cathode

the electrode where reduction occurs

NEVER multiply E⁰ values by

stoichiometric coefficients

higher E°

easily REDUCED —→ stronger oxidizing agent

lower E°

easily OXIDIZED —→ stronger reducing agent

is it solid | aq anode || aq cathode | solid

yes

voltaic or galvanic cells

E° cell must be POSITIVE, Delta G° = negative

concentration cell

E° cell = 0 V

if Q < 1

Ecell > 0

spontaneous reaction

K>1, delta G° <0, E°cell >0

products more abundant at eq

non spontaneous

K<1, delta G°>0, E°cell <0

react at more abundant eq

equilibrium

K=1, delta G° =0, E°cell =0

an electrolytic reaction is a system in which

electricity is used to produce a chemical reaction

LARGER reduction potential

cathode