redox reactions

Question 1

definition: oxidation

Answer 1

loss of electrons

Question 2

definition: reduction

Answer 2

gain of electrons

Question 3

what happens in displacement reactions?

Answer 3

a more reactive metal can replace a less reactive metal

Question 4

definition: oxidising agents

Answer 4

a species that oxidises something, but it itself is reduced

Question 5

definition: reducing agent

Answer 5

a species that reduces something, but it itself is oxidised

Question 6

definition: oxidation state

Answer 6

The number of electrons are needed to be gained or lost to make a neutral atom

Question 7

when does oxidation occur?

Answer 7

when the oxidation state increases

Question 8

when does reduction occur?

Answer 8

when the oxidation state decreases

Question 9

what is the oxidation state of hydrogen?

Answer 9

+1(mostly)
-1 (as a hydride)

Question 10

what is the oxidation state of a group 1 element?

Answer 10

+1

Question 11

what is the oxidation state of a group 2 element?

Answer 11

+2

Question 12

what is the oxidation state of a group 3 element?

Answer 12

+3

Question 13

what is the oxidation state of oxygen?

Answer 13

-2

unless bonded to F

Question 14

what is the oxidation state of F-

Answer 14

-1

Question 15

what is the oxidation state of Cl-

Answer 15

1-

unless bonded to F or O where O.S is positive

Question 16

what does the sun of oxidation states equal?

Answer 16

zero

Question 17

got up to page 11