Article Summary The normality is the measurement of acidic or basic concentration in a solution. All rights reserved. This image may not be used by other entities without the express written consent of wikiHow, Inc. Locate the elements in the chemical formula on a periodic table to find their atomic masses, which is the same as their molar masses.

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Article Summary The normality is the measurement of acidic or basic concentration in a solution. All rights reserved. This image may not be used by other entities without the express written consent of wikiHow, Inc.

Locate the elements in the chemical formula on a periodic table to find their atomic masses, which is the same as their molar masses.

Write down the molar mass of each element, and multiply them by the number of that element in the compound. Add all of the molar masses together to find the total molar mass. Multiply the mass by the amount of the element in the compound. In this example, there are 2 hydrogen and 4 oxygen atoms. Add all the molar masses together.

Then, divide the mass of the compound by the total molar mass you found before. A mole is equivalent to 6. The result will give you the molarity M , which is another way to measure the concentration of a solution.

Look at the chemical formula for the number of hydrogen atoms H in an acid or hydroxide molecules OH in a base. Find the product of the molarity times the number of hydrogen or hydroxide molecules in the compound in order to find the normality. Look at the chemical formula for the compound and locate each of the elements on the periodic table. Write down each of the molar masses listed and multiply them by the number of the specific element in the formula. Add the molar masses together to find the total molar mass in grams.

There are 2 oxygen and 2 hydrogen atoms in the compound. Count the number of hydrogen atoms H in an acidic compound or hydroxide molecules OH in a basic compound. Divide the total molar mass you found by the number of atoms or molecules so you can find the weight of 1 equivalent, which is the mass of 1 mole of hydrogen or hydroxide. Measure the total volume of the solution and write down your answer in liters. Use the number of equivalents you just found and divide it by the volume of the solution to get the normality.

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## College Chemistry : Molarity, Molality, Normality

Todd Helmenstine Updated November 06, Both molarity and normality are measures of concentration. What Is Molarity? Molarity is the most commonly used measure of concentration. It is expressed as the number of moles of solute per liter of solution. This is where normality is generally used. What Is Normality? Normality is a measure of concentration that is equal to the gram equivalent weight per liter of solution.

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## What Is the Difference Between Molarity and Normality?

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