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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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General topics: Concept of atoms and molecules; Dalton's atomic theory; Mole concept; Chemical formulae; Balanced chemical equations; Calculations (based on mole concept) involving common oxidation-reduction, neutralisation, and displacement reactions; Concentration in terms of mole fraction, molarity, molality and normality.
Chemistry Syllabus for IIT JEE by Vanya Tiwari / Science and technology, general community
This same sort of repetitive testing can be done with many concepts such as moles, molarity, molality, the periodic table, quantum numbers, and so forth.
Science education in the web era by Combs, Leon L. / Journal of Computers in Mathematics and Science Teaching
Electromotive-force measurements of cells containing hydrochloric acid and Holmium chloride at constant total molality have been used to determine the variation of the logarithm of the activity coefficient of hydrochloric acid with change in the amount of Holmium chloride in the solution.
Harned's Rule for the System HCl + [HOCl.sub.3] + [H.sub.2]O from 5 ... by Transactions of the Missouri Academy of Science
 
 
 
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