Chapter 8 - Reuduction and oxidation

Question 1

Oxidation refers to

Answer 1

gaining oxygen, losing hydrogen, or losing one or more electrons.

Question 2

Reduction refers to

Answer 2

losing oxygen, gaining hydrogen, or gaining one or more electrons.

Question 3

In an electrolytic cell,

Answer 3

the passage of an electrical current through an electrolyte causes a chemical reaction to occur.

Question 4

In a galvanic cell,

Answer 4

a spontaneous redox reaction occurs and generates an electrical current.

Question 5

An oxidation process is accompanied by

Answer 5

an increase in the oxidation state of the element involved.

Question 6

A reduction process is accompanied by

Answer 6

a decrease in the oxidation state of the element involved.

Question 7

The net change in oxidation states for the oxidation and reduction steps in a given reaction must

Answer 7

balance.

Question 8

Faraday constant

Answer 8

96485 C/mol

Question 9

For a thermodynamically favored cell reation:

Answer 9

E^o_cell is positive

deltaG^o is negative

K > 1

Question 10

For a spontaneous reaction, the value of E^o_cell is always

Answer 10

positive.

Question 11

The overpotential is

Answer 11

the additional potential above the value required by thermodynamics to initiate a reaction at an electrode.