Electrochemistry

Question 1

Cathode

Answer 1

the SOA and site of reduction half reaction

Question 2

Anode

Answer 2

the SRA and site of oxidation half reaction

Question 3

Electrode

Answer 3

solid pieces of metal where half reactions occur

Question 4

Salt bridge

Answer 4

allows the flow of ions between half cells

Question 5

Flow towards the anode

Answer 5

Anions

Question 6

Flow towards the cathode

Answer 6

Cations

Question 7

(Type of cell) are spontaneous

Answer 7

Volatic cells

Question 8

(Type of cell) are not spontaneous

Answer 8

Electrolytic cells

Question 9

Wire

Answer 9

allows electrons to flow from anode to cathode

Question 10

An SOA half reaction represents the..

Answer 10

cathode

Question 11

An SRA half reaction represents the..

Answer 11

anode

Question 12

Electrons flow from..

Answer 12

anode to cathode

Question 13

Anions move to the anode from the…

Answer 13

cathode half cell

Question 14

Cations move to the cathode from the…

Answer 14

anode half cell

Question 15

Inert electrode

Answer 15

an electrode (solid metal) that doesn’t react

Question 16

Common inert electrodes

Answer 16

Carbon (C) or platinum (Pt)

Question 17

When must an inert electrode be used?

Answer 17

when there is not a solid in the half reaction

Question 18

Any half reaction higher than hydrogen (0) has…

Answer 18

a positive potential difference

Question 19

Any half reaction lower than hydrogen (0) has…

Answer 19

a negative potential difference

Question 20

Potential difference (voltage) formula

Answer 20

cathode - anode or SOA - SRA

Question 21

If the reduction potential for Ag+ is +0.80, then what is it’s oxidation potential?

Answer 21

-0.80

Question 22

Converts chemical energy to electrical energy

Answer 22

Voltaic cells

Question 23

Converts electrical energy to chemical energy

Answer 23

Electrolytic cells

Question 24

E net is positive

Answer 24

Voltaic

Question 25

E net is negative

Answer 25

Electrolytic

Question 26

Ex. of what? Ag (s)|AgNO3 (aq)||Zn(NO3)2 (aq)|Zn (s)

Answer 26

Voltaic cell

Question 27

Ex. of what? C (s)|CuSO4 (aq)|C (s)

Answer 27

Electrolytic cell

Question 28

What type of cell needs two seperate beakers for an experiment?

Answer 28

Voltaic cells

Question 29

What type of cell can use one whole beaker for an experiment?

Answer 29

Electrolytic cells

Question 30

What does it mean when a substance is molten?

Answer 30

no water is present

Question 31

How do you determine a molten substance?

Answer 31

if an ionic compound has a liquid subscript (l)

Question 32

Formula to find moles of electrons

Answer 32

Ne=IT/F

Question 33

Ne = ?

Answer 33

moles of electrons

Question 34

I = ?

Answer 34

current (amps) c/s

Question 35

T = ?

Answer 35

time (seconds)

Question 36

F = ?

Answer 36

faraday's constant

Question 37

What words help determine if a question is cell stoich?

Answer 37

plated, current, or time

Question 38

Dry cell

Answer 38

sealed electric cell with semi-solid conductors

Question 39

Primary battery

Answer 39

cell that can't be recharged

Question 40

Secondary battery

Answer 40

rechargeable cell

Question 41

Fuel cell

Answer 41

cell where the fuel is continuously added

Question 42

Disporportionation reaction

Answer 42

occurs when a substance is both the OA and RA

Question 43

What reaction types are redox reactions?

Answer 43

single rep., formation, decomposition, combustion

Question 44

What reaction types are not redox reactions?

Answer 44

dbl rep., dissociation

Question 45

What is the oxidation number for all pure elements?

Answer 45

0

Question 46

What is the oxidation number for oxygen and what is the one exception?

Answer 46

it is always -2, except in peroxides which then it is -1

Question 47

What is the oxidation number for groups 1 and 2 on the periodic table?

Answer 47

group 1 is +1, group 2 is +2

Question 48

How is the oxidation number determined when two nonmetals combine?

Answer 48

the one with the higher EN will be the starting point to determine the others

Question 49

If the word "acidic" or "basic" is mentioned in a question, what species should be listed?

Answer 49

H+ and OH-

Question 50

What type of acids are not ionized meaning they don't dissociate completely?

Answer 50

weak acids

Question 51

What type of acids are ionized meaning they dissociate completely?

Answer 51

strong acids

Question 52

Reduction

Answer 52

gaining electrons

Question 53

Oxidation

Answer 53

losing electrons

Question 54

Ingredient added that causes reduction

Answer 54

RA

Question 55

Ingredient added that causes oxidation

Answer 55

OA

Question 56

Get oxidized, not reduced

Answer 56

RA's

Question 57

Get reduced, not oxidized

Answer 57

OA's

Question 58

Gain electrons, get reduced

Answer 58

OA's

Question 59

Lose electrons, get oxidized

Answer 59

RA's

Question 60

When electrons are lost, they are on...

Answer 60

the right side of the equation

Question 61

Electrons on the right side of equation

Answer 61

oxidation

Question 62

When electrons are gained, they are on...

Answer 62

the left side of the equation

Question 63

Electrons on the left side of the equation

Answer 63

reduction

Question 64

What happens to the electrons and overall charge when oxidation occurs?

Answer 64

electrons are lost, and charge gets more positive

Question 65

What happens to the electrons and overall charge when reduction occurs?

Answer 65

electrons are gained, and charge gets more negative