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Likewise, tripolyphosphoric acid H 5 P 3 O 10 yields at least five anions [H 5−k P 3 O 10] k−, where k ranges from 1 to 5, including tripolyphosphate [P 3 O 10] 5−. Tetrapolyphosphoric acid H 6 P 4 O 13 yields at least six anions, including tetrapolyphosphate [P 4 O 13] 6−, and so on. Note that each extra phosphoric unit adds one extra ...
Solid HP(O)(OH) 2 has tetrahedral geometry about the central phosphorus atom, with a P−H bond of 132 pm, one P=O double bond of 148 pm and two longer P−OH single bonds of 154 pm. In common with other phosphorus oxides with P−H bonds (e.g. hypophosphorous acid and dialkyl phosphites ), [ 2 ] it exists in equilibrium with an extremely minor ...
HPA is usually supplied as a 50% aqueous solution and heating at low temperatures (up to about 90 °C) prompts it to react with water to form phosphorous acid and hydrogen gas. H 3 PO 2 + H 2 O → H 3 PO 3 + H 2. Heating above 110 °C causes hypophosphorous acid to undergo disproportionation to give phosphorous acid and phosphine. [7] 3 H 3 PO ...
Hypophosphoric acid can be prepared by the reaction of red phosphorus with sodium chlorite at room temperature. [2]2 P + 2 NaClO 2 + 2 H 2 O → Na 2 H 2 P 2 O 6 + 2 HCl. A mixture of hypophosphoric acid, phosphorous acid (H 3 PO 3) and phosphoric acid (H 3 PO 4) is produced when white phosphorus oxidises in air when partially immersed in water.
This bonding mode is illustrated by [Mo 2 (HPO 4) 4] 4−, which features a Mo-Mo triple bond. [3] Related [Pt(III)] 2 complexes have been reported. [4] Tridentate, bridging. Several triangulo clusters feature a capping phosphate ligand, e.g. [Re 3 Cl 9 (PO 4)] 3−. [5] Encapsulated: In phosphotungstic acid, all four oxygen atoms of phosphate ...
3 PO 4, H 2 (PO 4) − and H(PO 4) 2− behave as separate weak acids because the successive pK a differ by more than 4. Phosphate can form many polymeric ions such as pyrophosphate, (P 2 O 7) 4−, and triphosphate, (P 3 O 10) 5−. The various metaphosphate ions (which are usually long linear polymers) have an empirical formula of (PO 3) − ...
The oxidation states are also maintained in articles of the elements (of course), and systematically in the table {{Infobox element/symbol-to-oxidation-state}} See also [ edit ]
Some phosphorus oxoacids have two or more P atoms in different oxidation states. One example is Isohypophosphoric acid, H 4 P 2 O 6 (or H(OH)(O)P−O−P(O)(OH) 2), a tetraprotic acid and isomer of hypophosphoric acid, containing P in oxidation state +3 and +5; Phosphoric anhydride P 4 O 10 Some phosphoric acids