3.1.7 Oxidation, reduction and redox equations

Question 1

What does OILRIG stand for ?

Answer 1

Oxidation is loss of electrons
Reduction is gain of electrons

Question 2

What is an oxidising agent ?

Answer 2

Something that takes electrons from something else, so is reduced itself as it gains electrons

Question 3

What is a reducing agent ?

Answer 3

Something that gives electrons to another compound, so is oxidised itself as it looses electrons

Question 4

A + B —–> A+ + B- Identify the oxidising agent

Answer 4

B, As it takes an electron from A meaning it is reduced itself

Question 5

A + B —–> A+ + B- Identify the reducing agent

Answer 5

A, As it gives an electron to B meaning it is oxidised itself

Question 6

What does an oxidation state show ?

Answer 6

How many electrons an atom has gained or lost

Question 7

In a compound with Flourine, Flourine;s oxidation state is always ___ ?

Answer 7

-1 as it is the most electronegative atom

Question 8

The oxidation state of oxygen is always ___ ?

Answer 8

-2

Question 9

Hydrogen always has an oxidation state of ___ ?

Answer 9

+1

Question 10

In a pure element its oxidation state is always ___ ?

Answer 10

0

Question 11

What is the oxidation state of oxygen in a peroxide ?

Answer 11

-1

Question 12

What is the oxidation state of hydrogen in a metal hydride ?

Answer 12

-1