Chapter 8

Question 1

Oxidation

Answer 1

Occurs when a substance gains Oxygen atoms or loses H atoms or loses electrons or when its oxidation number increases.

OIL

Question 2

Reduction

Answer 2

Occurs when a substance loses oxygen atoms or gains hydrogen atoms or gains electrons or when its oxidation number decreases.

RIG

Question 3

Oxidizing reagent

Answer 3

The substance that causes oxidation.

Question 4

Reducing reagent

Answer 4

The substance that causes reduction.

Question 5

Electrochemical Cell

Answer 5

Where the transfer of electrons in a redox reaction occurs.

Question 6

Electrode

Answer 6

Where the electrons are transferred.

Question 7

Anode

Answer 7

Where the oxidation occurs

Question 8

Cathode

Answer 8

Where the reduction occurs

Question 9

Battery

Answer 9

A series of connected cells.

Question 10

Fuel cell

Answer 10

Generates electricity by oxidizing a fuel in a cell to which the fuel and oxygen are supplied continuously

Question 11

Corrosion

Answer 11

Look it up

Question 12

Oxygen

Answer 12

An oxidizing aren’t that is essential to life. It reacts with metals and non metals to form oxides.

Question 13

Bleach

Answer 13

An oxidizing agent that removes unwanted color from fabric or other material.

Question 14

Catalyst

Answer 14

An agent that speeds up the reaction without itself being used up.

Question 15

Photosynthesis

Answer 15

The reduction of carbon dioxide

Question 16

Half- reaction

Answer 16

Look it up.

Question 17

Rules for determining oxidation numbers

Answer 17

1. An atom in its elemental form has an oxidation of 0.
2. If an atom is an ion, the oxidation number is equal to its charge.
3. Hydrogen and oxygen in compounds have an oxidation number of 1+ and 2-. (H= 1+, O= 2-)
4. in a poly tonic ion or molecule, the charges have to be equal to the charges of the ions or molecules.