equivalent weight


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weight

 [wāt]
1. heaviness; the degree to which a body is drawn toward the earth by gravity. (See also Tables of Weights and Measures in the Appendix.) Abbreviated wt.
2. in statistics, the process of assigning greater importance to some observations than to others, or a mathematical factor used to apply such a process.
apothecaries' weight see apothecaries' system.
atomic weight the sum of the masses of the constituents of an atom, expressed in atomic mass units (or daltons), in SI units (i.e., kilograms), or as a dimensionless ratio derived by comparing the mass to the mass of an atom of carbon-12, which is taken as 12.000. Abbreviated At wt.
avoirdupois weight see avoirdupois system.
equivalent weight the amount of 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 oxidation-reduction 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.
gram molecular weight the molecular weight of a substance expressed in grams; one gram molecular weight of a molecular substance contains one mole of molecules. See also mole1.
low birth weight (LBW) see under infant.
molecular weight the weight of a molecule of a chemical compound as compared with the weight of an atom of carbon-12; it is equal to the sum of the weights of its constituent atoms and is dimensionless. Abbreviated Mol wt or MW. Although widely used, the term is not technically correct; relative molecular mass is preferable.
very low birth weight (VLBW) see under infant.

gram e·quiv·a·lent

1. the weight in grams of an element that combines with or replaces 1 g of hydrogen;
2. the atomic or molecular weight in grams of an atom or group of atoms involved in a chemical reaction divided by the number of electrons donated, taken up, or shared by the atom or group of atoms in the course of that reaction;
3. the weight of a substance contained in 1 L of 1 n solution; a variant of (1).
References in periodicals archive ?
A contingency analysis was performed in order to understand the effect of PHMS-PDMS hydride equivalent weight of the starting copolymer on coating film uniformity/integrity.
In this paper, McCormack has used the weight and volume data from a sub-sample of the households surveyed in the HBS to develop a method which allows for the conversion of the estimated average weekly household expenditure on food to its equivalent weight or volume.
Symbols used in this paper and their units Symbol Meaning Units EC Electrical conductivity dS/m [z.sub.i] Charge of ion i eq/mol (A) [bar.z] Concentration-weighted eq/mol mean charge W Equivalent weight or g/eq equivalent-gram of ion i [bar.W] Concentration-weighted g/eq mean equivalent weight [N.sub.i] Equivalent concentration meq/L of ion i [C.sub.i] Molar concentration mmol/L [a.sub.i] Activity of ion i meq/L TDS Total dissolved salts mg/L I Ionic strength mmol/L [u.sub.i] Limiting equivalent ionic mS.[cm.sup.2].
CONTRACTORS working at Southwell racecourse are moving the equivalent weight of 530 double-decker buses to bring the all-weather track up to scratch, writes Howard Wright.
The opinion states that, although temporary regulations are to be given equivalent weight as final regulations, regulations issued under Sec.
Among the five strategies used by a majority of respondents, management and employee concerns receive nearly equivalent weight. Two of the methods (requests from managers and face-to-face discussions with managers) seek top-down input, and two (informal contact with employees and requests from readers) are bottom-up oriented.
To get the right weight to counterbalance the doors, the cylinders were filled with sand and tested, then sand was replaced with an equivalent weight of concrete.
Food waste was weighed separately and the equivalent weight added to the suit.
Campaign manager Ylva Haglund said: "Despite our love of beef in Scotland, we still throw away millions of pounds' worth every year, with an equivalent weight to 26million burgers or 13million steaks."
Sarah has now lost an impressive 3 stone, the equivalent weight to her 3 year old; the baby she was pregnant with when she started her weight loss journey.
The top-of-the-range Terraplas system - which is so strong it can take the equivalent weight of a 758-tonne armoured fighting vehicle on every square metre - will literally support One Direction's Harry Styles, Niall Horan, Louis Tomlinson and Liam Payne, their impressive stage rig and 100,000 dancing fans over two nights, while keeping the hallowed turf underneath in pristine condition.