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Normality Calculator

Normality Calculator is a free tool that helps to find the normality of the chemical solution. Just give the weight of the solute, the volume of the solvent and equivalent weight details in the fields of the tool and click the calculate button to avail the result in a fraction of seconds.

Weight of Solute
Volume of solvent
Equivalent Weight
/eq
Normality
N

Normality Calculator: Calculating the normality of a solution can be difficult for you. Here we are giving the step by step process to find the normality or equivalent weight of the solution. Along with the detailed explanation, you can also get the normality formula and example questions in the following sections.

Steps to Calculate the Normality

Below mentioned are the simple steps to find the concentration of the chemical solution. Go through these guiding principles to get the result.

  • Make a note of the weight of solute, the volume of solvent and equivalent weight.
  • Multiply the volume of the solvent with the equivalent weight.
  • Divide the mass of solute by the obtained product to check the normality.

What is Normality?

Normality is used to measure the equivalent concentration of the solution. It is the ratio of the equivalent weight of the solute to the litres of the solution.

The gram equivalent of a substance is the atomic or molecular weight of the substance divided by its valency.

The importance of normality is mentioned here.

  • It is used in precipitation reactions to measure the number of ions.
  • It plays a vital role in chemical laboratories, drugs, medicines, water treatment plants and others.
  • In acid-base chemistry, the number of hydroxide or hydronium ions concentration of the solution is considered as the solution normality.
  • In redox reactions, the number of electrons that are involved for exchange either by a reducing agent or oxidizing agent is the normality.

Normality Formula

The formula to calculate the normality of a chemical solution is mentioned here:

Normality N = weight of solute/(volume of solvent x equivalent weight)

Normality N = Equivalent of solute/liters of solution

N = (Molarity × Molar mass)/ [Equivalent mass]

N = Molarity × Basicity = Molarity × Acidity

Number of gram equivalents = weight of solute / [Equivalent weight of solute]

Example:

Question: Calculate the normality of NaOH solution formed by dissolving 0.1 gm NaOH to make 250 ml solution.

Answer:

Given that,

Volume of the solution = 250 ml

Equivalent weight of NaOH = 23 + 16 + 11 = 40

Normality = weight of the solute/(volume of the solvent x equivalent weight)

= (1 x 1000)/(40 x 250)

= 0.1

Therefore, the normality of the NaOH solution is 0.1 N.

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Frequently Asked Question's on Normality Calculator

1. What is meant by normality?

The normality of a chemical solution is defined as the equivalent concentration of the solution. It is the ratio of the gram equivalent weight to the litres of the solution.


2. How to calculate the normality?

Multiply the volume of the solvent with the equivalent weight of the solution. Divide the weight of the solute by the product to check the normality of the chemical reaction.


3. What is the relationship between molarity and normality?

Normality represents the concentration of the solution in terms of H+ ions for the acid solution or OH- ions for the base solution. Molarity means the concentration of a solution in terms of ions and compounds. The relation between the normality and molarity is normality = molarity x number of H+ or OH- ions.


4. What is the SI unit of normality?

The SI unit of normality is the gram equivalent weight of a solute per litre.