# What is Normality in Chemistry?

(What is Normality in Chemistry)– Usually gram equivalent is a measure of concentration per liter of weight. The gram equivalent mass is a measure of the reactive potential of a molecule. The normalcy of the solution is determined by the involvement of the solute in the reaction. The corresponding concentration of the solution is also known as normality.

# Normality Equation :

The normality (N) molar concentration C divided by the similarity factor Freq is:

A more general equation is Normality(N), equal to the gram equivalent weight divided by the liter of the solution:

N = grams equivalent weight/liter of solution (often expressed in g/L)

Or the scholar can be multiplied by the number of equivalents:

n = scholar x equivalent

## Units of Normality :

In terms of normalcy, the capital letter N is used to denote concentration. It can also be expressed as eq/l (equivalent to per liter) or mek/l (0.001 N multivalent per liter, usually reserved for medical reporting).

## Common example :

For acid reactions, a 1 M H 2 SO 4 solution will have normality (N) of 2 N because there are 2 moles of H+ ions present per liter of solution. For sulfide precipitation reactions, where the SO4- ion is the important part, the same 1 M solution of H2SO4 will have a normality of 1N.

### Example problem :

For the reaction: find the normality of 0.1 M H 2 SO 4 (sulfuric acid).

H2SO4 + 2 NaOH → Na2SO4 + 2 H2O

According to the equation, 2 moles of H+ ions (2 equivalents) from sulfuric acid react with sodium hydroxide (NaOH) to form sodium sulfate (Na2SO4) and water. Using the equation:

n = scholar x equivalence n = 0.1 x 2n = 0.2 n

Don’t get confused by the number of moles of sodium hydroxide and water in the equation.