The molarity of a substance is a scientific way to talk about how concentrated it is. Molarity describes the number of moles of the substance per liter of liquid.

In chemistry, a mole is a unit of measurement for a chemical substance. The scientific noun molarity describes the concentration of a substance as measured by the number of moles divided by the volume of the solution it's in. So a chemist might talk about the molarity of Sodium Chloride in a liter of water. Molarity comes from mole, which was coined by a German chemist from Molek├╝l, German for "molecule."

Definitions of molarity

n concentration measured by the number of moles of solute per liter of solution

M, molar concentration
Type of:
the strength of a solution; number of molecules of a substance in a given volume

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