molarity
Americannoun
noun
Usage
What is molarity? Molarity is the number of moles of solute per one liter of solution. The symbol for molarity is a capital M. In chemistry, a solution is a mixture of two or more substances in which neither substance changes chemically. For example, salt water is a solution that contains water (the solvent) and salt (the solute). Concentration is the amount of dissolved substance in a solution. In other words, it is the amount of stuff that has been mixed into your liquid. Concentration is usually measured in molarity. A mole is a basic unit in chemistry. It is the amount of a substance in grams that contains as many atoms, molecules, or ions as 12 grams of carbon-12 (6. 022 x 1023) does. A mole of oxygen, for example, is 6. 022 x 1023 atoms of oxygen. Molarity is the number of moles of a solute per liter of solution. If we wanted to know the molarity of our saltwater solution, we’d want to know how many moles of salt are in every 1 liter of the water.
Etymology
Origin of molarity
Explanation
The molarity of a substance is a scientific measurement of its concentration. Molarity describes the number of moles of a solute — a dissolved substance — per liter of liquid. In chemistry, a mole is a standard unit of measurement for a chemical substance. The scientific term molarity describes the concentration of a substance, calculated as the number of moles divided by the total volume of the solution it's in. For example, a chemist might talk about the molarity of sodium chloride dissolved in water. Molarity comes from mole, which was coined by a German chemist from Molekül, German for "molecule."
Vocabulary lists containing molarity
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Using the provided volume of HCl solution and the definition of molarity, the HCl concentration is:
From Textbooks ● Feb. 14, 2019
These units are popular in environmental, medical, and other fields where mole-based units such as molarity are not as commonly used.
From Textbooks ● Feb. 14, 2019
If the solution has a density of 0.9956 g/mL, calculate the molarity of the solution.
From Textbooks ● Feb. 14, 2019
Assume a density of 1.0 g/mL and calculate the molarity of mercury in the stream.
From Textbooks ● Feb. 14, 2019
Concentrations may be measured using various units, with one very useful unit being molarity, defined as the number of moles of solute per liter of solution.
From Textbooks ● Feb. 14, 2019
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
