molarity

nounC2Very rare — outside the 30,000 commonest English words, so you will meet it in writing rather than in speechToo rare in one of the two pools to compare — fewer than 20 uses in speech or in writing

Molarity is how many molecules of a substance sit in a litre. Calculate the molarity, a molarity of one, the molarity of the solution.

It is measured in moles per litre, and a mole is a fixed enormous number of particles chosen so the mass in grams matches the atomic weight. Temperature changes it slightly, since a litre expands when warm.

Definitions of molarity

1nounmolarityHow many molecules of a substance sit in a litre.C2
“Calculate the molarity of the salt solution before you start the experiment.”

molarity is a measure.

Where it comes from

From molar in the chemical sense, from mole, the unit of amount of substance.

From molar + ity in the chemistry usage.

Etymology from Wiktionary, CC BY-SA

Practised in Chemistry & Elements

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molarity in the wild

Molar concentration (also called amount-of-substance concentration or molarity) is the number of moles of solute per liter of solution.
Molar concentration
In chemistry, the most commonly used unit for molarity is the number of moles per liter, having the unit symbol mol/L or mol/dm3 (really (mol/m3)/1000) in SI units.
Molar concentration
The number ratio can be related to the various units for concentration of a solution such as molarity, molality, normality, etc.
Colligative properties
The factor binds osmolarity to molarity and osmolality to molality.
Van 't Hoff factor
The osmolarity of a solution is usually expressed as Osm/L (pronounced "osmolar"), in the same way that the molarity of a solution is expressed as "M" (pronounced "molar").
Osmotic concentration

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From Wikipedia, CC BY-SA 4.0. These sentences were written by other people about their own subjects; they are here to show the word at work, not as anybody’s opinion.

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