equivalent weight

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 equivalent weight is the ratio of the molecular weight to the number of protons involved in the reaction. For redox reactions, one equivalent donates or receives a mole of electrons, and the equivalent weight is the ratio of the molecular weight to the number of electrons involved in the reaction.

Medical dictionary. 2011.

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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 — 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 — noun 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 a …   Wiktionary

  • 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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