Week 9/10 Review

in a galvanic cell, what is oxidized and reduced

in a galvanic cell, what is oxidized and reduced

cathode reduced, anode oxidized

in a galvanic cell, where do electrons flow from and to

flow from anode to cathode

in a galvanic cell, what does the salt bridge give the anode/cathode

anions, cations respectively

for any work to be done by an electrochemcial system, what must be true? (G and DeltaE)

gibbs free energy must be negative and potential difference energy must be postiive

for an electrochemical process to be spontaneous, what must be true? (deltaG and deltaE)

gibbs free energy must be negative and potential difference energy must be positive

E0cell=

E0cathode-E0canode

when looking at srp tables, what must you consider? what should you do?

values must be in respect to reduction, electrons on reactants side. if not, flip E0

when do redox reactions favor products with respect to G, K, Ecell

negative, >1, +

when do redox reactions favor reactants with respect to G, K, Ecell

positive, <1, negative

when are redox reactions at equilibrium with respect to G, K, Ecell

0, 1, 0

dry leclanche cell: what is anode and cathode

anode is zinc, cathode is manganese

lead storage battery, what is anode and cathode

anode is lead, cathode is oxidized lead

nickel metal hydride battery, what is anode and cathode, what is included that is epcial

anode is nickel, cathode is water, rare earth metal

fuel cell, what is anode and cathode

anode is hydrogen, cathode is water

what is electryloysis

when electric energy is used to power a nonspontaneous reaction

electrolysis and water splits…

into H and O2

electrolysis splits NaCL into…

Na and Cl2

corrosion, 2 things (needs, and what happens?)

needs water and oxygen, metal dissolves into water, electron from metal goes to oxygen, becomes rust