Redox Reactions

Question 1

What is a redox reaction?

Answer 1

When a reduction and oxidation happens in the same equation or reaction.

Question 2

3 properties of oxidation?

Answer 2

Loss of e-s, gain of O, loss of H.

Question 3

3 properties of reduction?

Answer 3

Gain of e-s, loss of O, gain of H.

Question 4

OILRIG

Answer 4

Oxidation Is Loss, Reduction Is Gain.

Question 5

LEO

Answer 5

Loss Electrons Oxidation.

Question 6

Where are e-s gained in reduction?

Answer 6

On the left.

Question 7

Where are e-s lost in oxidation?

Answer 7

On the right.

Question 8

What do oxidation states show?

Answer 8

How many e-s the atom has used in bonding.

Question 9

What is the oxidation state of an atom in an element?

Answer 9

0.

Question 10

What is the oxidation state of a simple ion?

Answer 10

Its charge.

Question 11

What is the fixed oxidation state of group 1?

Answer 11

+1.

Question 12

What is the fixed oxidation state of group 2?

Answer 12

2+.

Question 13

What is the fixed oxidation state of group 3?

Answer 13

3+.

Question 14

What is always the oxidation state of fluorine and why?

Answer 14

-1, most electronegative and able to pull e-s to itself.

Question 15

What is the oxidation state of O nearly always?

Answer 15

-2.

Question 16

When does the oxidation state of O change?

Answer 16

When it’s with fluorine and in hydrogen peroxide.

Question 17

What is the usual oxidation state of chlorine?

Answer 17

-1.

Question 18

When does the oxidation state of chlorine change?

Answer 18

When it’s with O or F.

Question 19

When is the oxidations state of H +1?

Answer 19

When bonded to a non metal.

Question 20

When is the oxidation state of H -1?

Answer 20

When bonded to a metal ion.

Question 21

The sum of the oxidation states of all the atoms and ions in a compound is always what?

Answer 21

0.

Question 22

The sum of the oxidation states in a polyatomic ion is always what?

Answer 22

The charge of the ion.

Question 23

An oxidising agent causes another species to be what?

Answer 23

Oxidised and lose electrons.

Question 24

What happens to the oxidising agent when it’s interacting with another species?

Answer 24

Reduces itself and gains the e-s.

Question 25

An oxidising agent is called an electron….?

Answer 25

Accepter.

Question 26

A reducing agent causes another species to be what?

Answer 26

Reduced and gain e-s.

Question 27

What happens to the reducing agent when it’s interacting with another species?

Answer 27

Oxidises itself and loses the e-s.

Question 28

A reducing agent is called an electron….?

Answer 28

Donor.

Question 29

An increase in oxidation states is oxidation or reduction?

Answer 29

Oxidation.

Question 30

A decrease in oxidation states is oxidation or reduction?

Answer 30

Reduction.

Question 31

What does a half equation contain?

Answer 31

E-s.

Question 32

Steps for balancing an easy half equation?

Answer 32

Balance the element, add e-s to make both sides equal charge.

Question 33

Steps for balancing a hard half equation?

Answer 33

Balance the element that changes oxidation states, add water to side with least O to balance, add H+ ions to balance H, add e-s to make both sides equal charge.

Question 34

When we put two half equations together we need to make sure of what?

Answer 34

That one shows oxidation and the other shows reduction, e-s cancel out.

Question 35

What are the steps to combining half equations?

Answer 35

Put product together, put reactants together, cancel e-s, cancel anything else.