ch. 11

Question 1

redox reduction

Answer 1

oxidation reduction reaction
reaction with a transfer of e-

Question 2

oxidation vs reduction

Answer 2

oxidation: lose e-
reduction: gain e-

Question 3

reducing agent
oxidizing agent

Answer 3

reducing agent: what is oxidized
oxidizing agent: what is reduced

Question 4

galvanic cell

Answer 4

device in which chemical energy is changed to electrical energy
spontaneous
reduction happens at cathode
oxidation happens at anode

Question 5

cell potential

Answer 5

driving force in galvanic cell that pulls e- from one compartment to the other
anode–> cathode

Question 6

standard reduction potential

Answer 6

E^o >0 is more spontaneous

Question 7

concentration cell

Answer 7

standard cell reduction potential = 0 so
E=-0.0591/n * log(Q)

Question 8

Electrolysis

Answer 8

-reaction which requires a current to be driven
-changes electrical energy to produce chemical energy
reverse galvanic cell reaction
nonspontaneous

Question 9

batteries how they work
E

Answer 9

batteries act like galvanic cell while discharging
- stored chemical energy is discharging and turning into electrical energy
- E is the max potential energy that the battery has before the current starts flowing
when the battery dies, E=0 and reaction is at equilibrium

Question 10

Lithium ion batteries

Answer 10

lithium ions spontaneously go from anode to cathode
when you charge your phone, electrolysis occurs and you move lithium ions from cathode to anode nonspontaneously

Question 11

fuel cells

Answer 11

galvanic cell where the reactants are continually supplied
- you have to constantly supply it with a chemical
- pump in a fuel, do an electrochemical reaction, and then exhaust the byproducts out

Question 12

galvanization

Answer 12

process of applying a protective zinc coating to steel or iron to prevent iron oxidation