Electrolysis

AP chemistry unit 18

oxidation

loss of electrons more (+) on product side

reduction

gaining electrons (more -) on product side

oxidation

____ is with the anode

reduction

______ is with the cathode

-

anode is the ____ side of the battery

+

cathode is the ____ side of the battery

cathode

cations from salt bridge flow to the _____ (reduction)

anode

anions from salt bridge flow to the _____

gains

while a battery is working, the cathode _____ mass

loses

while a battery is working the anode ____ mass

reduction

this reaction has the most positive e cell

electrons

the ______ must cancel out in the half reactions

down

if Q increases, then the voltage (ecell) of the battery goes:

galvanic cell

battery

galvanic cell

spontaneous reaction (-delta G)

electrolytic cell

requires an external electron source

• non spontaneous

salt bridge

required to maintain charge balance in a galvanic cell

galvanic cell

2 containers joined by a salt bridge

galvanic cell

generate electricity

electrolytic

require a battery/electricity

positive anode

EPA: electrolytic have a:

inert

electroytic cells use ____ electrodes most of the time

positive

negative delta G means a ____ e cell

negative

positive delta G means a ____ e cell

positive

if K>1 (forward) then e cell will be:

negative

if k<1 (reverse) then e cell will be:

forward

if the reaction is moving in the ____ direction to reach standard concentrations then e cell will increase

reverse

if the reaction is moving in the ___ direction to reach standard concentrations then e cell will decrease

concentration cell

galvanic cell in which both compartments contain the same components but at different concentrations

ampere

coulumbs/sec

I

= q/t

q

symbol for charge in coulombs

I

symbol for current in amperes

1 mol e

96485 coulumbs =