Chemistry chapter 10 (Redox reaction)

Question 1

Define Oxidation.

Answer 1

When a substance gains oxygen during a reaction; when it loses an electron, or when its oxidation number increases

Question 2

Define Reduction.

Answer 2

When a substance loses oxygen in a reaction; when it gains Electrons, and when oxidation number decreases.

Question 3

Why is the reaction called redox reaction?

Answer 3

Because Oxidation never happens without Reduction.

Question 4

Examples of Redox reaction.

Answer 4

Combustion- An exothermic reaction in which a substance reacts with an oxygen

Respiration- Process to breakdown food into simpler substances during digestion.

Question 5

What are the oxidation number rules?

Answer 5

. Elements have an oxidation number of 0
. Group 1 has an oxidation of +1
. Group 2 has an oxidation number of +2
. Hydrogen has an oxidation number of +1
. Oxygen has an oxidation number of -2
. Fluorine and other Halogens have an oxidation number of -1

Question 6

How to calculate oxidation number of an element in a compound?

Answer 6

The oxidation number of atoms in a compound must add up to 0

Question 7

Define Oxidation number?

Answer 7

A number given to an element to determine if it has been oxidized or reduced.

Question 8

What does LEO stand for?

Answer 8

Loss of Electron is Oxidation

Question 9

What does GER stand for?

Answer 9

Gain of Electron is Reduction

Question 10

What is Oxidizing Agent?

Answer 10

That substance which oxidizes somebody else. It is Reduced in the process. (Usually H,C,CO)

Question 11

What is Reducing Agent?

Answer 11

That substance which reduces somebody else. It Oxidizes in the process. (Usually O from air, H2O2, KMnO4, K2CrO7)