Oxidation, reduction and redox reactions 7

Question 1

oxidation

Answer 1

used for reactions in which oxygen is used

Oxidation is the process of electron loss and oxidising agents are electron acceptors.

Question 2

reduction

Answer 2

a reaction in which oxygen is removed

Reduction is the process of electron gain and reducing agents are electron donors.

Question 3

redox reaction

Answer 3

when oxidation and reduction both happen at the same time

Question 4

OILRIG

Answer 4

oxidation is loss and reduction is gain

Question 5

oxidation state

Answer 5

used to see what has been oxidised or reduced in a redox reaction

Question 6

Oxidising agent

Answer 6

A reagent that oxidies (removes electrons from) another species

Question 7

Reducing agent

Answer 7

A reagent in which an atom or a group of atoms gain electrons

Question 8

Half-equation

Answer 8

An equation for a redox reaction which considers just one of the species involved and shows explicitly the electrons transferred

Question 9

Oxidising state of group 1

Answer 9

+1

Question 10

Oxidising state of group 2

Answer 10

+2

Question 11

Oxidising state of oxygen

Answer 11

Usually-2
Unless peroxide H2O2 -1
Unless in OF2 +2

Question 12

Oxidising state of hydrogen

Answer 12

+1

Unless metal hydroxide

Question 13

Oxidising state of fluoride

Answer 13

-1

Question 14

Oxidising state of chlorine

Answer 14

Usually -1

Except with O or F when its positive

Question 15

Superoxide

Answer 15

Each oxygen oxidation number is 1/2
Potassium us heated in oxygen
KO2 ( colour is orange or yellow) / K2O2 / K2O

Single covalent bond between the oxygen atom and negative charge resulting from potassium atom

4KO2 + 2CO2 ➡️ 2K2CO3 + 3O2

Question 16

Carbonate

Answer 16

CO3 2-

Question 17

Sulphate

Answer 17

SO4 2-

Question 18

Nitrate

Answer 18

NO3-