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concentration

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concentration

In chemistry, the amount of a substance (solute) present in a specified amount of a solution. Either amount may be specified as a mass or a volume (liquids only). Common units used are moles per cubic decimetre, grams per cubic decimetre, grams per 100 cubic centimetres, and grams per 100 grams.

The term also refers to the process of increasing the concentration of a solution by removing some of the substance (solvent) in which the solute is dissolved. In a concentrated solution, the solute is present in large quantities. Concentrated brine is around 30% sodium chloride in water; concentrated caustic soda (caustic liquor) is around 40% sodium hydroxide; and concentrated sulphuric acid is 98% acid.



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? Mentioned in ? References in classic literature
 
Stripped of a great deal of somewhat obscure metaphysical theory, this distinction reduced itself to the certainly vital one, with which all true criticism more or less directly has to do, between the lower and higher degrees of intensity in the [94] poet's conception of his subject, and his concentration of himself upon his work.
The Guardian by Pater, Walter Horatio View in context
It proved, incontrovertibly, the disastrous effects of machinery and division of labour; the concentration of capital and land in a few hands; overproduction and crises; it pointed out the inevitable ruin of the petty bourgeois and peasant, the misery of the proletariat, the anarchy in production, the crying inequalities in the distribution of wealth, the industrial war of extermination between nations, the dissolution of old moral bonds, of the old family relations, of the old nationalities.
The Communist Manifesto by Marx, Karl & Engles, Frederick View in context
Yet when due respect has been paid to this critic of old time, the fact still remains that concentration and suggestion are the two essentials of Chinese poetry.
A Lute of Jade by Cranmer-Byng, L. View in context
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