Chapter 12 (Oxidation and reduction)

Question 1

What is oxidation

Answer 1

-gain oxygen
-loss of hydrogen
-loss of electrons
-oxidation state increases

Question 2

What is reduction

Answer 2

-loss oxygen
-gain hydrogen
-gain electrons
-oxidation state decreases

Question 3

What reactions and redox reactions?

Answer 3

respiration, photosynthesis and the haver process

Question 4

What reactions are non-redox reactions

Answer 4

Acid-base reactions and precipitation of salts

Question 5

What do oxidising agents do

Answer 5

-oxidise another substance
-increase the oxidation state of an element in another substance
-gain electrons from the other substance

Question 6

What are examples of oxidising agents

Answer 6

oxygen, chlorine, potassium manganate (VII)

Question 7

What do reducing agents do

Answer 7

-reduce another substance
-decrease the oxidation state of an element in another substance
-lose electrons to the other substance

Question 8

What are examples of reducing agents

Answer 8

hydrogen, reactive metals, carbon and potassium iodide