Template:Concentration and density
From Bioblast
Concentration and density in different formats
- Concentration is an extensive quantity divided by volume V, or a count divided by volume V. The elementary entities X (or B) or the sample type s have to be specified in the text or indicated by a subscript or in parentheses. Examples: cell-count concentration Cce; count concentration of protons CH+; molar concentration of protons cH+. Density is not only 'mass density 蟻, but is used for many extensive quantities divided by volume or area.
Concentration Symbol Definition Unit Note Count concentration CX = NX路V-1 [x路L-1] The IUPAC term 'number concentration' should be replaced by 'count concentration' (or 'number of entities concentration'). Amount concentration cB = nB路V-1 [mol路L-1] Amount concentration is a counting concentration, converting the elementary unit [x] into moles [mol] using the Avogadro constant. Charge concentration CQX = QX路V-1 [C路L-1] Charge concentration is a counting concentration, converting the elementary unit [x] into coulombs C using the elementary charge, or converting moles [mol] into coulombs [C] using the Faraday constant. Charge density in electricity is 'charge per volume'. Mass concentration of X CmX = mX路V-1 [kg路L-1] Mass concentration CmX is mass of entities X per volume V of the mixture. Mass density of S 蟻S = mS路VS-1 [kg路L-1] Mass density 蟻S is mass of the pure sample S per volume VS of the pure sample; 蟻S is the reciprocal of specific volume. Volume concentration of X CVX = VX路V-1 [L路L-1] Volume concentration CVX is the volume of entities X per volume V of the mixture. Volume density 桅X = VX路V-1 [L路L-1] Volume density is equivalent to the volume fraction.