Definition of H4P2O7. Meaning of H4P2O7. Synonyms of H4P2O7

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Definition of H4P2O7

H4P2O7
Pyrophosphoric Pyr`o*phos*phor"ic, a. [Pyro- + phosphoric.] (Chem.) Pertaining to, or designating, an acid, H4P2O7, which is obtained as a white crystalline substance. Its salts are obtained by heating the phosphates.

Meaning of H4P2O7 from wikipedia

- diphosphoric acid, is the inorganic compound with the formula H4P2O7 or, more descriptively, [(HO)2P(O)]2O. Colorless and odorless, it is soluble in water, diethyl...
- phosphoric acids, it is the next polyphosphoric acid after pyrophosphoric acid, H4P2O7, also called diphosphoric acid. Compounds such as ATP (adenosine triphosphate)...
- equilibria: H2SO4H2O + SO3 SO3 + H2SO4H2S2O7 The acid is prepared by reacting excess sulfur trioxide (SO3) with sulfuric acid: H2SO4 + SO3 → H2S2O7 Disulfuric...
- 33–40. doi:10.1042/BJ20021862. PMC 1223469. PMID 12665427. Benschop, H. P.; De Jong, L. P. A. (1988). "Nerve agent stereoisomers: analysis, isolation and toxicology"...
- chloride: CaCl2 + H4P2O7(aq) → Ca2P2O7·2 H2O + HCl. The anhydrous forms can be prepared by heating dicalcium phosphate: 2 CaHPO4 → Ca2P2O7 + H2O At 240-500 °C...
- comparison, phosphoric acid, H3PO4 can be formulated as 3H2O·P2O5 and pyrophosphoric acid, H4P2O7, as 2H2O·P2O5. Metaphosphates can be used as an alternative of...
- ion, [Cr2O7]2−: 2 [HCrO4]− ⇌ [Cr2O7]2− + H2O      log KD = 2.05. Furthermore, the dichromate can be protonated: [HCr2O7]− ⇌ [Cr2O7]2− + H+      pK = 1.8...
- reaction). In cooling down a clathrate SO2·​5 3⁄4H2O will crystallise which decomposes again at 7 °C. Thus sulfurous acid H2SO3 cannot be isolated. Aqueous solutions...
- lower pH, while basic solutions have a higher pH. At room temperature (25°C or 77°F), pure water is neither acidic nor basic and has a pH of 7. The pH scale...
- Ca(OH)2. P4 + 4 OH− + 4 H2O4 H 2PO− 2 + 2 H2 The salt is then treated with a strong, non-oxidizing acid to give the free hypophosphorous acid: H 2PO− 2 +...
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