Normality Equation

To calculate the volume of a definite solution required to prepare solutions of other normality, the following equation is used:

N₁V₁=N₂V₂, where N₁=initial normality and N₂=normality of the new solution, a nd V₁= initial volume and V₂= volume of the new solution.

The normality equation is commonly used to calculate the normality of solutions after dilution. The above equation is also called as dilution formula because it helps in calculating the volume of the solvent required in diluting a concentrated solution. The same equation holds good for calculations involving molarity (M).