Updated About encyclopedia.com content Print Article
activity coefficient (γ) The ratio of chemical activity (i.e. the effective concentration, a) of a component in a solution, to the actual mole fraction (X) present in solution: (γ = a/X). Values for activities are determined experimentally in a number of ways, including measuring the ratio of the vapour pressure (p) of a known concentration of the substance in solution to the vapour pressure (p*) of the pure substance: a = p/p*. In an ideal solution the activity coefficient = 1, and the activity of the component is equal to its mole fraction. In general, the greater the amount of dissolved material, the lower the activity coefficients of each of the species present.
More From encyclopedia.com
saline , sa·line / ˈsāˌlēn; -ˌlīn/ • adj. containing or impregnated with salt: saline alluvial soils. ∎ chiefly Med. (of a solution) containing sodium chlorid… Titration , titration Method used in analytical chemistry to determine the concentration of a compound in a solution by measuring the amount needed to complete a… Physiological Saline , physiological saline A liquid medium in which animal tissues may be kept alive for a few hours during experiments without pathological changes or dis… Concentration Gradient , Concentration Gradient A concentration gradient occurs where the concentration of something changes over a certain distance. For example, a few drops… Solution Channel , Skip to main content solution channel Colloid , Colloid A colloid is a mixture of substances in which the particles of one substance are of greater than molecular size but are stabilized, at least…
You Might Also Like