pyrophosphoric acid


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Related to pyrophosphoric acid: pyrophosphate, hypophosphoric acid

pyrophosphoric acid

[¦pī·rō·fä′sfȯr·ik ′as·əd]
(inorganic chemistry)
H4P2O7 Water-soluble, syrupy liquid melting at 61°C; used as a catalyst and to make organic phosphate esters.
References in periodicals archive ?
What happens is that the first dissociation of pyrophosphoric acid has [pK.sub.a] 0.70 and the initial pH of the solution is 1.1.
As in the case of the titration of pyrophosphoric acid, we proceed to substitute the equations so that an expression for each species becomes expressed as a function of the known formation quotients and the concentration of ammonia.
Just as the algebra for the multiple stages of acidic dissociation of pyrophosphoric acid and the derived titration curve pose no problem for the algebraic processor (Maple for these calculations), so the algebra for the multiple stages of complexation of [Cu.sup.2+] is managed directly and without approximation, for the purpose of creating Figure 3 that accurately illustrates the distribution of copper(II) species as a function of concentration of N[H.sub.3] ligand.