Question

What is difference betwwen pyro hypo and ortho?

Answer 1

PhosphorusContextAcidsChemistryWhat is the meaning of ortho, pyro, and meta as in the context of phosphoric acids?ad by Scott Phillips TradingGet my free professional trader cheat sheet.Trading isn't about predicting what happens next. It's about having a system with an edge.2 AnswersKurt Van den Broeck, Ph.D. in Polymer chemistryUpdated Mar 25 · Author has 893 answers and 1.5m answer viewsRonak provided a good answer in the context of phosphoric acid (although I do not fully agree with his description of metaphosphoric acid)I want to take the opportunity of using the prefixes ortho , pyro and meta in a more general context:Ortho is Greek and means ‘true’, so ortho would be the true form of something, more correctly the prefix ortho refers to the most hydrated form of the oxo-acid. The most hydrated form in this case is PO3−4 but for other elements it might ys ys hsdifferent:orthophosphoric acid: H3PO4
orthoboric acid: H3BO3(=B(OH)3)
orthosilicic acid: H4SiO4(=Si(OH)4)
orthoperiodic acid: H5IO6 (=IO(OH)5) (as fully hydrated form of periodic acid: HIO4+2H2O→H5IO6
orthotelluric acid: H6TeO6(=Te(OH)6)
Orthocarbonic acid: H4CO4(=C(OH)4) (only organic esters of this the hypothetical ortho-acid of H2CO3 exist)The usage of ortho was used consistently in the past, but the red book of IUPAC nomenclature of inorganic chemistry (see Red_Book_2005.pdf) has removed the usage in the cases of boric acid, silicic acid and phosphoric acid: