3. Redox 1

Question 1

what is oxidation

Answer 1

the loss of electrons

Question 2

what is reduction

Answer 2

the gain of electrons

Question 3

what is an oxidation number

Answer 3

it gives the oxidation state of an element or ionic substance

Question 4

what is the oxidation number of oxygen in peroxides

Answer 4

-1

Question 5

what is the oxidation number of hydrogen in metal hydrides

Answer 5

-1

Question 6

what is an oxidising agent

Answer 6

the substance that is reduced. it accepts electrons from the species being oxidised

Question 7

what is a reducing agent

Answer 7

the substance that is oxidised. it donates electrons to the species being reduced

Question 8

what is a redox reaction

Answer 8

a reaction where oxidation and reduction occur at the same time to different species.

Question 9

what is a disproportionation reaction

Answer 9

is where oxidation and reduction occurs when the same species is simultaneously oxidised and reduced.

Question 10

what are half equations

Answer 10

used to show separate oxidation and reduction reactions.