Redox

Question 1

what is oxidation? 3 definitions

Answer 1

1. addition of O2
2. loss of hydrogen
3. loss of electrons

Question 2

what is reduction? 3 definitions

Answer 2

1. loss of oxygen
2. addition of hydrogen
3. gain of electrons

Question 3

what is an oxidising agent?

Answer 3

the atom that gets reduced as it causes the other atom to lose e-
oxidation state of the oxidising agent decreases

Question 4

what is the reducing agent?

Answer 4

the atom that gets oxidised as it causes the another atom to gain e-
oxidation state of reducing agent increases

Question 5

what are the 7 oxidation rules?

Answer 5

1. uncombined elements = 0
2. monatomic ion = charge (Na+ = +1)
3. Groups = charge (Group 1 = +1, Group 7 = -1)
4. Hydrogen = +1 but -1 in metal hydrides
5. Oxygen = -2 but -1 in peroxides, +2 in F2O
6. Totals =
   sum of O state in neutral compounds = 0
   sum of O state in ions = ion charge
7. more electronegative element is given the negative O state