Oxidation & Reduction

Question 1

Examples of processes that can be used to describe oxidation

Answer 1

addition of oxygen

loss of hydrogen

loss of electrons

Question 2

Examples of processes that can be used to describe reduction

Answer 2

Loss of oxygen

addition of hydrogen

gain of electrons

Question 3

The oxidation state of an atom is the

Answer 3

charge that would exist on an individual atom if the bonding were completely ionic

It is like the electronic ‘status’ of an element

Question 4

Oxidation states are used to

Answer 4

Tell if oxidation or reduction has taken place
Work out what has been oxidised and/or reduced
Construct half equations and balance redox equations

Question 5

hydrogens oxidation state

Answer 5

+1

except in metal hybrids e.g NaH -1

Any hydrogen compound that is bonded to another metal element

Question 6

group 1

Answer 6

+1

Question 7

group 2

Answer 7

2+

Question 8

aluminium group

Answer 8

3+

Question 9

Oxygen

Answer 9

2- except in peroxide -1

H2O2

Any time the number of Oxygen atoms in a formula exceeds the valence of the “metal” to which they are attached you can assume it is a “peroxide”.

Question 10

fluorine F

Answer 10

-1

Question 11

uncombine elements + diatomic that are not compounds Fe (metal) F2 ,02

Answer 11

0