Normality & Normal solution

Every chemistry students should be familiar with these terms. Actually what is normality? First remember that normality is a chemical unit used to express the concentration of a solution. Do you know the definition for normality?
Definition for normality
Normality is the number of gram equivalent of the solute present in one litre of the solution. In general we can say that
Normality of the solution=Number of gram equivalent of solute/Litres of solution.
Also it is important to note that if w is the weight in gram of the solute & E is the equivalent weight of the solute present in V litres of the solution, then
Normality of the solution =w/EV
We can prove this by the following problems:
Problem 1:

How can we calculate the number of grams of solute in 300ml of 1.5N NaOH solution?

Solution:

Given normality=1.5 N

Volume of the solution= 300ml= 0.3 litre=V

Equivalent weight of NaOH =40=E

So here the equation used is Normality of the solution= w/EV

Therefore w=1.5*40*o.3=18 gram

Problem 2:

How can we calculate the normality of a solution containing 224gram KOH in 2 litre of the solution?

Solution:

Normality=Number of gram equivalent of the solute/Volume of the solution in litre

Here volume = 2 litre

Number of gram equivalent of the solute=224/56=4

Therefore normality=4/2=2N

Definition for one normal solution

One normal solution means it contains one gram equivalent weight of the solute per litre of the solution.