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Author: Subject: Equivalence
nightflight
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[*] posted on 2-3-2007 at 11:46
Equivalence


Hi,

if, for reagents and solvents, there´re equivalents given, what does it mean? Is it molar eq. or eq. weight, which would be mol divided through the valence?

So if I had a rxn that says: substance a + subst.b (1.2 eq.),

reacts with kat (0.5mol%) and Solvent 1.2eq., to products of eq.

-mol% is clear but what about the solvent eq, since it has no valence in the reaction, does it?

thanks,
nightflight
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nightflight
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[*] posted on 2-3-2007 at 15:16


It´s ok, I´ve got it, please delete, if you think this discussion is obsolete.
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Nicodem
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[*] posted on 3-3-2007 at 00:25


If an equivalent is called for, then it is meant as equivalent according to the reaction stoichiometry. That is what it should generally mean, but if it does not, then it should be apparent from the procedure what exactly is meant. This always holds true for the academic literature (patents are often a different story).
There are no reaction equivalents for solvents, utmost there are equivalent weights or volumes of solvents but that is something completely different.




…there is a human touch of the cultist “believer” in every theorist that he must struggle against as being unworthy of the scientist. Some of the greatest men of science have publicly repudiated a theory which earlier they hotly defended. In this lies their scientific temper, not in the scientific defense of the theory. - Weston La Barre (Ghost Dance, 1972)

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