Chapter 20 - Oxidation Reduction Reactions

Question 0

OIL RIG

Answer 0

Oxidation is loss of electrons.

Reduction is gain of electrons.

Question 1

What happens to a substance that undergoes oxidation? What happens to a substance that undergoes reduction?

Answer 1

A substance that undergoes oxidation gains oxygen. A substance that undergoes reduction loses oxygen.

Question 2

Oxidation

Answer 2

Complete or partial loss of electrons or gain of oxygen.

Question 3

Reduction

Answer 3

Complete or partial gain of electrons or loss of oxygen.

Question 4

Reducing agent

Answer 4

The substance that loses electrons.

Question 5

Oxidation agent

Answer 5

The substance that accepts electrons.

Question 6

Oxidation number

Answer 6

A positive or negative number assigned to an atom to indicate its degree of oxidation or reduction.

Question 7

What are the two classes of chemical reactions?

Answer 7

One class of chemical reactions is oxidation-reduction (redox) reactions, in which electrons are transferred from one reacting species to another.

Question 8

Half-reaction method

Answer 8

You write are balance the oxidation and reduction half reactions separately before combing them into a balanced redox equation.

Question 9

Electrochemical cell

Answer 9

Any device that converts chemical energy into electrical energy or electrical energy into chemical energy.