Redox Definitions

Question 1

Oxidation

Answer 1

Loss of electrons

Question 2

Reduction

Answer 2

Gain of electrons

Question 3

Oxidising agent

Answer 3

Oxidises other species
Accepts electrons so they’re reduced
Electron acceptor

Question 4

Reducing agent

Answer 4

Reduces other species
Donates electrons - electron donors

Question 5

In simple ions what is the oxidation state equal to

Answer 5

Ion charge
Eg. Cl- = -1

Question 6

Atom oxidation state

Answer 6

0

Question 7

In a compound what does the sum of the oxidation states add up to

Answer 7

0

Question 8

Hydrogen oxidation state (+exception)

Answer 8

+1

Exception = metal hydrides / peroxides (H2O2)

Question 9

Oxygen oxidation state (+exceptions)

Answer 9

-2

Exceptions = peroxides (H2O2) and in compounds with F

Question 10

Fluorine oxidation state

Answer 10

-1

Question 11

Why does fluorine have no exceptions for its oxidation state?

Answer 11

Because its the most electronegative element so electrons cant be taken away from it

Question 12

Chlorine oxidation state (+exceptions)

Answer 12

-1

Exceptions = when in a compound with O or F

Question 13

What does oxidation do to oxidation state

Answer 13

Increases it

Eg. H2 —> 2H+ + 2e-

Question 14

What does reduction do to the oxidation state

Answer 14

Decreases it

Eg. Fe3+ + e- —> Fe2+