5/7 echem Flashcards
(11 cards)
what occurs at the anode
oxidation
what occurs at the cathode
reduction
oxidation results in
loss of electrons
reduction results in
gain of electrons
why must the electrons cancel in an overall redox reaction
the electrons produced at the anode are consumed at the cathode
how do you write a cell notation
anode on left, cathode on right, solids on outside, aqueous on inside, phases separated by solid line
for an oxidation reaction, how do you find the standard electric potential
you take the reduction reaction, flip it, and change the signs of the standard potential
why does E° not change when a oxidation/reduction reaction is multiplied?
´E° is an intensive property
what is the standard hydrogen electrode
it is an electrode where the standard potential is zero, all other potentials are made relative to the standard hydrogen electrode
for spontaneous reactions, what is the sign of E°
E° is positive
