Redox 1

Question 1

redox reaction

Answer 1

a reaction in which one substance is reduced and another is oxidized.

Question 2

Oxidation

Answer 2

Gain of oxygen
Loss of electrons
Increase in oxidation number

Question 3

Reduction

Answer 3

Loss of oxygen
Gain of electrons
Decrease in oxidation number

Question 4

reducing agent

Answer 4

reduces another species, is oxidised itself. donates electrons.

Question 5

oxidising agent

Answer 5

oxidises another species, is reduced itself. accepts electrons.

Question 6

Oxidation number

Answer 6

The number of electrons that an atom uses to bond with an atom of another element

Question 7

oxidation number of an element

Answer 7

0

Question 8

oxidation number of a monatomic ion

Answer 8

equals the charge on the ion. eg: Mg + Cl2—-> MgCl2. Mg= +2 Cl= -1

Question 9

oxidation number of oxygen

Answer 9

-2

Question 10

oxidation number of hydrogen

Answer 10

+1, except in metal hydrides when it is -1

Question 11

usual oxidation number of halides

Answer 11

-1

Question 12

how to tell oxidation has occurred by oxidation number

Answer 12

oxidation number increases

Question 13

how to tell reduction has occurred by oxidation number

Answer 13

oxidation number decreases