Redox

Question 1

What does OILRIG mean

Answer 1

Oxidation is Loss Reduction is Gain

Question 2

What is a redox reaction

Answer 2

Where oxidation and reduction happen at the same time

Question 3

What are half equations used to show

Answer 3

What happens during a redox reaction to ONE species during that reaction

Question 4

What is a reducing agent

Answer 4

A substance which reduces another species

Question 5

What is an oxidizing agent

Answer 5

A substance which oxidises another species

Question 6

What is rule 1

Answer 6

The oxidation of any element is 0 eg Zn or Ag

Question 7

What is rule 2

Answer 7

The oxidation number of a monoatomic ion is the charge of that ion eg Mg 2+ or Cl-

Question 8

What is rule 3

Answer 8

The oxidation number of oxygen in a compound is -2 eg MgO

Question 9

What is rule 4

Answer 9

The oxidation number of hydrogen in a compound is +1 eg HCl

Question 10

What is rule 5

Answer 10

The oxidation number of halides in a compound is -1 eg NaCl

Question 11

What is rule 6

Answer 11

The oxidation number of all the atoms in an uncharged compound add up to 0

Question 12

What are the exception towards oxygens oxidation number

Answer 12

Hydrogen peroxide- -1
F20 - +2

Question 13

What is the exception towards hydrogens oxidation number

Answer 13

When bonded to metal (metal hydrides) it is -1