U3.1. Oxidation and Reduction

Question 1

Oxidation

Answer 1

Loss of electrons or increasing oxidation state

Question 2

Reduction

Answer 2

Gain of electrons or decrease in oxidation state

Question 3

Oxidizing Agent

Answer 3

Accepts electrons and gets reduced in a chemical reaction, causing another substance to be oxidized.

Question 4

Reducing Agent

Answer 4

Donates/ loses electrons and gets oxidized in a chemical reaction, causing another substance to be reduced.

Question 5

Redox and the Displacement of Metals

Answer 5

The more reactive metal is oxidized (loses electrons), and the less reactive metal ion is reduced (gains electrons).

Question 6

Redox and Combustion

Answer 6

Oxidation of fuel (loss of electrons) and the reduction of oxygen (gain of electrons), with energy being released as heat and light.

Question 7

Redox and Corrosion

Answer 7

The metal undergoes oxidation, losing electrons, and the environment, often oxygen or water, undergoes reduction. Weakens the metal overtime.

Question 8

Redox and Electrochemical process

Answer 8

Generate or use electrical energy by transferring electrons between substances.

Question 9

Oxidation State (number)

Answer 9

A number assigned to an atom in a molecule or ion, indicating the number of electrons lost or gained relative to the element’s neutral state