equivalent weight

The atomic weight of an element or radical divided by its valence; the molecular weight of a compound divided by its combining power in a specific reaction.

In the proportion d : p :: 1 : v, as applied to any liquid or solid species, p does not represent its real equivalent weight, but the weight of the normal species which, by its condensation, gives rise to the liquid or solid.


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  • Equivalent weight — is the amount of an element that reacts, or is involved in reaction with, 1 mole of electrons. It is defined by many texts as the weight of the element combining with 1 g hydrogen, 8 g oxygen or 35.5 g chlorine, each of which would either provide …   Wikipedia

  • equivalent weight — n EQUIVALENT (1) * * * the amount of a substance that combines with or displaces 8.0 g of oxygen (or 1.008 g of hydrogen), usually expressed in grams; for acid base reactions, one equivalent donates or receives a mole of protons, and the… …   Medical dictionary

  • equivalent weight — Chem. the combining power, esp. in grams (gram equivalent), of an element or compound, equivalent to hydrogen as a standard of 1.00797 or oxygen as a standard of 8; the atomic weight divided by the valence. [1925 30] * * * or combining weight… …   Universalium

  • equivalent weight — noun the atomic weight of an element that has the same combining capacity as a given weight of another element; the standard is 8 for oxygen • Syn: ↑equivalent, ↑combining weight, ↑eq • Hypernyms: ↑atomic mass, ↑atomic weight, ↑relative atomic… …   Useful english dictionary

  • equivalent weight — ekvivalentų molio masė statusas T sritis Standartizacija ir metrologija apibrėžtis Medžiagos molio masės ir ekvivalentinio daugiklio sandauga. atitikmenys: angl. equivalent weight; molar mass of equivalents rus. мольная масса эквивалентов, f;… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • equivalent weight — ekvivalentų molinė masė statusas T sritis chemija apibrėžtis Medžiagos molinės masės ir ekvivalentinio daugiklio sandauga. atitikmenys: angl. equivalent weight; molar mass of equivalents rus. мольная масса эквивалентов …   Chemijos terminų aiškinamasis žodynas

  • equivalent weight — equiv′alent weight′ n. chem. the combining power, esp. in grams (gram equivalent), of an element or compound, equivalent to hydrogen as a standard of 1.00797 or oxygen as a standard of 8; the atomic weight divided by the valence. • Etymology:… …   From formal English to slang

  • equivalent weight — noun Date: circa 1855 the mass of a substance especially in grams that combines with or is chemically equivalent to eight grams of oxygen or one gram of hydrogen ; the atomic or molecular weight divided by the valence …   New Collegiate Dictionary

  • equivalent weight — /əˌkwɪvələnt ˈweɪt/ (say uh.kwivuhluhnt wayt) noun Chemistry Obsolete the weight of an element or compound which will combine with, or replace, 1.007 97 grams of hydrogen or 8 grams of oxygen; for an element, the atomic weight divided by the… …   Australian English dictionary

  • equivalent weight —    see equivalent …   Dictionary of units of measurement

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