Chapter 20 Electrochemistry

Question 1

Redox Reactions

Answer 1

Chemical reactions where electrons are transferred from one substance to another

Question 2

Every half reaction has

Answer 2

Potential, or voltage

Question 3

Cell potential (emf, electromotive force) can be calculated for redox reaction by

Answer 3

Adding the potentials for the half reactions

Question 4

Ecell =

Answer 4

Eoxidation + Ereduction

Question 5

Voltage and spontaneity are related by the equation

Answer 5

Delta g = -nFE^o

Question 6

Delta g

Answer 6

Standard Gibbs free energy

Question 7

n

Answer 7

Number of moles of electrons exchanged in the reaction

Question 8

If the standard reaction potential is positive, the reaction is

Answer 8

Spontaneous

Question 9

If the standard reaction potential is negative, the reaction is

Answer 9

Nonspontaneous

Question 10

Voltaic or galvanic cell uses

Answer 10

Spontaneous redox reaction to generate electricity

Question 11

Oxidation occurs at the

Answer 11

Anode

Question 12

Reduction occurs at the

Answer 12

Cathode

Question 13

Anode is generally viewed as

Answer 13

The source of electrons and given the negative designation

Question 14

In oxidation, electrons are on the ___________ side

Answer 14

Product

Question 15

Electrolysis reactions are

Answer 15

Nonspontaneous redox reactions driven by electrical energy

Question 16

Electrolysis reactions take place in an

Answer 16

Electrolytic cell

Question 17

Coulombs =

Answer 17

Amps * seconds

Question 18

Electrolytic cell

Answer 18

Uses an outside power source to force a nonspontaneous reaction to take place

Question 19

If concentrations of products are decreased, the ecell will increase

Answer 19

Tru

Question 20

Electrochemistry

Answer 20

Study of electricity and chemical reactions