oxidation, reduction electrochemistry

Question 1

Oxidation

Answer 1

LEO- Loss of electron is oxidation

Question 2

Reduction

Answer 2

GER - Gain of electron is reduction

Question 3

relationship between oxidation and oxidation state

Answer 3

oxidation state increases as oxidation increases. Meaning that as electrons are lost, oxidation state increases

Question 4

oxidizing agent

Answer 4

it is reduced and gains electrons. it has the lower Eo

Question 5

reducing agent

Answer 5

it is oxidized and loses electrons. it has the higher Eo

Question 6

anode

Answer 6

where oxidation takes place

Question 7

cathode

Answer 7

where reduction takes place

Question 8

salt bridge

Answer 8

keeps ions in balance. it send negative ions to the anode and positive to the cathode

Question 9

short hand notation for electrochemical cell

Answer 9

anode | solution that the anode is in || solution cathode is in | cathode

|| represents the salt bridge.

Question 10

standard electrode potential

Answer 10

it is given in reduction using half reactions. If it is positive, it is spontaneous.

Question 11

E^o cell

Answer 11

E cell = E cathode - E anode

Question 12

DGcell

Answer 12

DGcell = -nFEcell
where DG = delta Gcell
n = number of moles or charges
F = faraday’s constant = 96500 C/mol e-

when DGcell < 0 then rxn is spontaneous

Question 13

reference

Answer 13

lec 14 pg 29