00:01
Mole ratio is the ratio between the different amounts of the reactants or the products that are involved in a balanced chemical equation.
00:11
Suppose we have a balanced chemical equation which requires 1 mole of a that reacts with 2 moles of b to give 3 moles of c.
00:23
As there is no coefficient in front of a that means there is 1 mole involved.
00:27
So it tells us that the ratio of a is to b that is necessary to complete this reaction is 1 is to 2 and the ratio by which c is formed with respect to a is 1 is to 3 that means for every 1 mole of a 3 moles of c will be produced.
00:51
It is important as it helps us to calculate the amount that is necessary to complete a reaction.
01:00
For example, ammonia is produced using nitrogen and hydrogen.
01:08
Now as per this balanced equation 1 mole of nitrogen needs 3 moles of hydrogen.
01:19
Suppose initially we had 5 moles of nitrogen.
01:24
Therefore, 5 moles of nitrogen will need.
01:28
Now we do not know how much of hydrogen we need to add.
01:31
So for that here we will use the dimensional analysis that 1 mole needs 3 moles so 5 moles will need 3 multiplied by 5 divided by 1.
01:42
So we get 15 moles of hydrogen...