TOPIC 13- ELECTROCHEMISTRY

Question 1

is the study of the relationships between electricity
and chemical reactions. It includes the study of both spontaneous and
nonspontaneous processes.

Answer 1

Electrochemistry

Question 2

is the loss of electrons. (oxidation number increases)

Answer 2

Oxidation

Question 3

is the gain of electrons. (oxidation number decreases)

Answer 3

Reduction

Question 4

The oxidizing agent is __________, and the reducing agent is _________.

Answer 4

reduced, oxidized

Question 5

its purpose is to keep track of what loses electrons and what gains them

Answer 5

Oxidation Numbers

Question 6

increase in oxidation numbers means

Answer 6

oxidized

Question 7

decrease in oxidation numbers means

Answer 7

reduced

Question 8

What are the electrochemical cells?

Answer 8

1. Voltaic Cell
2. Electrolytic Cell

Question 9

Energy is released from a
spontaneous redox reaction and Work is done by the system on the load.

Answer 9

voltaic cell

Question 10

Energy is absorbed from a
nonspontaneous redox reaction and work is done on the system by the load.

Answer 10

Electrolytic Cell

Question 11

In a _________, the mass of the anode decreases over time as it turns
into ions, while the mass of the cathode increases.

Answer 11

voltaic cell

Question 12

In voltaic cell, the electrical flow is always

Answer 12

from the anode to the cathode

Question 13

In Electrolytic Cell, the electrical flow is

Answer 13

from the cathode to the anode

Question 14

have values corresponding to reduction half-reactions with all solutes at 1 M and all gases at 1 atm.

Answer 14

Standard reaction potentials 𝐸𝑐𝑒𝑙𝑙

Question 15

The more positive the value of the standard reduction potential, the greater the tendency for ——— under standard conditions.

Answer 15

reduction

Question 16

have the most positive reduction potentials.

Answer 16

strongest oxidizers

Question 17

have the most negative reduction potentials.

Answer 17

strongest reducers

Question 18

The cell potentials of ——- are higher than those of the cathodes.

Answer 18

anode

Question 19

The cell potential in a voltaic cell is

Answer 19

always positive

Question 20

The increase and decrease of concentration is _____________ to cell
potential

Answer 20

directly proportional

Question 21

When the concentration of reactants is increased, both the electron driving
force and cell potential __________.

(products are favored, shifts right)

Answer 21

increases

Question 22

When the concentration of the products is increased, both the electron
driving force and cell potential —–.

(reactants are favored, shifts left)

Answer 22

decreases

Question 23

Both compartments of ___________
have the same components but at different
concentrations.

Answer 23

concentration cells

Question 24

is the only factor
that produces a cell potential.

Answer 24

Difference in concentration

Question 25

The electrons flow in the direction that tends
to

Answer 25

equalize the concentration

Question 26

Oxidation occurs on the

Answer 26

dilute solution

Question 27

gives the relationship between the cell potential and
the concentrations of the cell components.

Answer 27

nernst equation