Chapter 20

Question 1

Charge (Q) is measured in

Answer 1

Coulombs

Question 2

Faradays constant=

Answer 2

Avogadros times electron charge

Question 3

Amperes is equal to

Answer 3

1 C/s

Question 4

Potential

Answer 4

the potential energy of a unit charge at a particular point in a circuit
defined as the potential energy involved in moving a charge of 1 C to that point from
infinity (difficult to measure

Question 5

Potential difference is the same as :

Answer 5

Voltage

Question 6

Voltage is defined as :

Answer 6

1J of work required to move 1 C

Question 7

R(Resistence)

Answer 7

obstruction of current flow

Question 8

Ohm’s law

Answer 8

V=I

Question 9

Ohm’s law is an approximation/always accurate

Answer 9

an approximation

Question 10

C Capacitance

Answer 10

tendency of a device with two conductors separated by an insulator to absorb
charge when the voltage between the conductors is changed.units of FArads

Question 11

system that incorporates
a redox reaction to produce or utilize electrical
energy.

Answer 11

Electrochemical cell

Question 12

does work by releasing energy from a spontaneous

reaction to produce electricity : ____

Answer 12

voltaic cell

Question 13

does work by absorbing energy from a source of electricity

to drive a nonspontaneous reaction: _____

Answer 13

electrolytic cell

Question 14

Sum of ox states for all atoms in a neutral formula is zero

Answer 14

absorb

Question 15

Sum of ox states of all atoms in polyatomic ion = ion charge.

Answer 15

absorb

Question 16

Oxidation priority trends with ______

Answer 16

electronegativity

Question 17

The oxidizing agent is the species that gets ______

Answer 17

reduced

Question 18

The reducing agent is the species that gets _________

Answer 18

oxidized

Question 19

The total number of electrons gained by atoms/ions of
the oxidizing agent always equals the total number of
electrons lost by the atoms/ions of the reducing agent.

Answer 19

absorb

Question 20

Cr2O72−(aq) + Zn(s) -> Cr3+(aq) + Zn2+(aq) (acidic) balance bitch!

Answer 20

14H+ +Cr2O7 2- +3Zn -> 3Zn 2+ +7 H2O

Question 21

MnO4−(aq) + Br−(aq)-> MnO2(s) + BrO3−(aq) (basic)

Answer 21

H2O + 2 MnO4− + Br−-> 2MnO2 + BrO3− + 2OH−

Question 22

In these cells its necessary to Physically separate the reduction
from the oxidation

Answer 22

Voltaic

Question 23

In the cell, electrons
leave the anode and
flow through the wire to
the cathode.Which cell?

Answer 23

Voltaic cell

Question 24

As the electrons leave
the anode, the cations
formed dissolve into the
solution in the anode
compartment.

Answer 24

Voltaic cell

Question 25

``` As the electrons reach the cathode, cations in the cathode are attracted to the now negative cathode. ```

Answer 25

voltaic cell

Question 26

``` The electrons are taken by the cation, and the neutral metal is deposited on the cathode. ```

Answer 26

Voltaic cell

Question 27

a | represents a ___ ____

Answer 27

phase boundry

Question 28

a || represents a ____ ____

Answer 28

salt bridge

Question 29

Do all voltaic cells have salt bridges?

Answer 29

no, they can have a porous barrier

Question 30

Some cell reactions require an inert electrode such as platinum

Answer 30

absorb

Question 31

Ecell is exactly the same as emf?

Answer 31

yes | Hi future me

Question 32

For a spontaneous cell reaction Ecell>/

Answer 32

>

Question 33

1 Volt =

Answer 33

1 joule/ coulomb

Question 34

A cell potential is the potential ______ between two electrodes (half-cells).

Answer 34

difference

Question 35

SHE is the

Answer 35

standard hydrogen electrode which =0

Question 36

Increasing electronegativity increases oxidizing agent strength (how readily reduced) so the highest would be __

Answer 36

Fluorine

Question 37

Li is a strong reducing agent (easily oxidized) due to it's low ______

Answer 37

electronegativity

Question 38

H is 0 E because its the standard

Answer 38

absorb

Question 39

The lower E value = the anode value

Answer 39

true

Question 40

E is an _____ property (like density) | this means that coefficients don't change the value.

Answer 40

intensive

Question 41

Negative wmax means

Answer 41

that work can be done by the system

Question 42

Wmax is theoretical and cant be obtained without the lack of a current flow

Answer 42

true

Question 43

For any operating cell, current ___ flow and hence w

Answer 43

will

Question 44

In a concentration cell the elements are the same but the ____ is different

Answer 44

Molarity

Question 45

A primary battery is:

Answer 45

self contained and non rechargable

Question 46

A secondary battery is self contained and

Answer 46

rechargeable

Question 47

A battery that uses a liquid electrolyte in solution

Answer 47

wet cell battery

Question 48

A battery that uses a paste electrolyte

Answer 48

dry cell

Question 49

Fuel cells

Answer 49

a voltaic cell that uses fuels (O2 and conventional fuels) to convert chemical energy into electrical energy.

Question 50

``` Alkaline Manganese Dioxide (alkaline battery) • Lithium Manganese Dioxide • Zinc Air • Silver Oxide (button) ```

Answer 50

are all primary batteries

Question 51

``` Lead-Acid (car battery) • Nickel-Metal Hydride (Ni-MH) • Nickel-Cadmium (NiCd) • Lithium Ion ```

Answer 51

are all secondary batteries

Question 52

Cathodic protection, making iron behave more like a cathode prevents corrosion

Answer 52

Galvanized steel is coated with a sacrificial layer of | zinc so the zinc is oxidized instead of the iron.

Question 53

In an ________ cell, electrical energy from an external source drives a nonspontaneous reaction.

Answer 53

electrolytic

Question 54

a cell that uses electrical energy to drive a | nonspontaneous reaction

Answer 54

Electrolytic cell