Full Answer
What is the name of the compound P2O5?
Phosphorus pentoxide is a chemical compound with molecular formula P 4 O 10 (with its common name derived from its empirical formula, P 2 O 5 ). This white crystalline solid is the anhydride of phosphoric acid. It is a powerful desiccant and dehydrating agent. How many moles are in P 2 O 5?
What is the solubility of P2O5 in H2SO4?
As P2O5 is soluble in H2SO4, is it possible that P2O5 will have~100 ppm solubility at pH~5.5? If you can find a copy of the CRC Handbook of Chemistry and Physics in your library, look up the solubility products of phosphate salts. This can be used to calculate their solubilities in water.
What is the melting and boiling point of P2O5?
The melting point of this P 2 O 5 is 613K. Its boiling point corresponds to 633K (however, it undergoes sublimation at this temperature). Phosphorus pentoxide undergoes violent hydrolysis when exposed to water.
What happens when P2O5 reacts with water?
It is very hygroscopic and is converted by water to H3PO4 via intermediates. The reaction with water is very vigorous and proceeds with the evolution of a large amount of heat. Due to its highly hygroscopic and microcrystalline character, the capability of flowing of P2O5 may vary in a certain range.
Is P2O5 soluble or insoluble?
Phosphorus pentoxideNamesDensity2.39 g/cm3Melting point340 °C (644 °F; 613 K)Boiling point360 °C (sublimes)Solubility in waterexothermic hydrolysis25 more rows
What happens when P2O5 reacts with water?
Diphosphorus pentoxide reacts with water to produce phosphoric acid (H3PO4).
Is P2O5 polar or nonpolar?
In P2O5, molecule, two phosphorous atoms have no lone pair and five oxygen atom has each of two lone pair. P2O5 is a polar molecule.
Is P2O5 a solid liquid or gas?
Phosphorus Pentoxide is a chemical compound whose empirical formula is P2O5 and whose molecular formula is P4O10. At ambient temperatures, this compound exists as a white solid that is crystalline in nature. Phosphorus pentoxide is an acid anhydride that is obtained from phosphoric acid.
What type of reaction is P2O5 h2o?
0:011:49How to Balance P2O5 + H2O = H3PO4 (Decomposition ... - YouTubeYouTubeStart of suggested clipEnd of suggested clipTo balance this equation we have p2o5 plus h2o and that gives us this phosphoric acid here this is aMoreTo balance this equation we have p2o5 plus h2o and that gives us this phosphoric acid here this is a combination reaction these two things are coming together to form this new substance.
What happens when you mix water and phosphorus?
In water, white phosphorus reacts with oxygen within hours or days. In water with low oxygen, white phosphorus may degrade to a highly toxic compound called phosphine, which eventually evaporates to the air and is changed to less harmful chemicals.
What kind of bond is P2O5?
P2 O5 is covalent. A general clue that a compound is covalent is two nonmetallic elements bonded together.
Is P2O5 molecular or ionic?
Answer and Explanation: P2O5 P 2 O 5 is a molecular compound. Molecular compounds are those where the elements are bonded through covalent bonds.
Is P2O5 acidic or basic?
P2O5 is acidic in nature.
What is P2O5 called?
Phosphorus pentoxide (P2O5)
Why is P2O5 not diphosphorus pentoxide?
The compound's name however was derived from its empirical formula, not from its molecular formula. The standard name for this compound is actually diphosphorus pentoxide. The di- prefix is used to show that the compound contains two phosphorus atoms and the penta- prefix is used to show it contains five oxygen atoms.
Why is phosphorus expressed as P2O5?
thank you Dr. Rajan for your kind reply, I general we said P2O5 because: 1- P naturally exists in oxide form and 2- when we said 46% sounds better than we said 20.24 kilogram P in each bag of triple super phosphate .....! Good justifications! The fertilizer manufacturers also have a stake to popularize their products.
How does P2O5 react with water in cold and hot state?
When P2O5(orP4O10) is heated with water, it form orthophosphoric acid (H3PO4).
Which of the following product is formed when phosphorus pentoxide is dissolved in water?
P2O5+3H2O→2H3PO4.
Which acid is not formed by action of water on P2O5?
H3PO3.
What is the product formed when phosphorus trioxide is dissolved in water?
Phosphorus trioxide reacts with water to form phosphorous acid, reflecting the fact that it is the anhydride of that acid.
What is Phosphorus Pentoxide?
Phosphorus Pentoxide is a chemical compound whose empirical formula is P 2 O 5 and whose molecular formula is P 4 O 10.
How many picometers are in phosphorus pentoxide?
Structure of Phosphorus Pentoxide. It can be noted that the P=O bond length in this compound is 143 picometers and the P-O bond length is 160 picometers.
How many picometers are in a P-O bond?
It can be noted that the P=O bond length in this compound is 143 picometers and the P-O bond length is 160 picometers.
How many different polymorphs does a sulfate crystallize?
This compound crystallizes in four different polymorphs.
Is phosphorus pentoxide an anhydride?
Phosphorus pentoxide is an acid anhydride that is obtained from phosphoric acid. It is highly hygroscopic and is, therefore, used as a dehydrating agent and as a desiccant.
How does phosphorus pentoxide crystallize?
Phosphorus pentoxide crystallizes in at least four forms or polymorphs. The most familiar one, a metastable form (shown in the figure), comprises molecules of P 4 O 10. Weak van der Waals forces hold these molecules together in a hexagonal lattice (However, in spite of the high symmetry of the molecules, the crystal packing is not a close packing ). The structure of the P 4 O 10 cage is reminiscent of adamantane with Td symmetry point group. It is closely related to the corresponding anhydride of phosphorous acid, P 4 O 6. The latter lacks terminal oxo groups. Its density is 2.30 g/cm 3. It boils at 423 °C under atmospheric pressure; if heated more rapidly it can sublimate. This form can be made by condensing the vapor of phosphorus pentoxide rapidly, and the result is an extremely hygroscopic solid.
What is phosphorus pentoxide used for?
For most of the 20th century, phosphorus pentoxide was used to provide a supply of concentrated pure phosphoric acid. In the thermal process, the phosphorus pentoxide obtained by burning white phosphorus was dissolved in dilute phosphoric acid to produce concentrated acid.
Is phosphorus pentoxide a dehydrator?
Phosphorus pentoxide is a potent dehydrating agent as indicated by the exothermic nature of its hydrolysis: However, its utility for drying is limited somewhat by its tendency to form a protective viscous coating that inhibits further dehydration by unspent material. A granular form of P 4 O 10 is used in desiccators .
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Thank you Frank T. Edelmann and Adam B Shapiro for your important inputs. This will helpful for my project.
Popular Answers (1)
Dear Dhiraj Bhalachandra Thakur thank you for your interesting technical question. In order to give you a qualified answer you should try to be a bit more specific. First of all, please note that there is no such compound as P 2 O 5. The most common oxide of phosphorus is P 4 O 10 (see attached schematic formula).
All Answers (6)
P 2 O 5 reacts with water to form phoshoric acid. Did you mean pyrophosphate (P 2 O 74- )?
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What is phosphorus pentoxide?
Phosphorus pentoxide is a white, microcrystalline, light weight powder which is produced by the combustion of elemental phosphorus in an excess of oxygen. Phosphorus pentoxide is the anhydride of orthophosphoric acid, H3PO4. It is very hygroscopic and is converted by water to H3PO4 via intermediates.
Why is phosphorus pentoxide used as a drying agent?
Because of its strong hygroscopic properties phosphorus pentoxide can be used as a drying agent.
How to make superphosphoric acid?
Various grades of superphosphoric and polyphosphoric acids can be manufactured by blending phosphorus pentoxide with phosphoric acid.
Is P2O5 hygroscopic?
It is very hygroscopic and is converted by water to H3PO4 via intermediates. The reaction with water is very vigorous and proceeds with the evolution of a large amount of heat. Due to its highly hygroscopic and microcrystalline character, the capability of flowing of P2O5 may vary in a certain range. Furthermore, the formation of soft agglomerates, ...
What is the phosphate form that plants take up?
Orthophosphoric acid. Both the wet and dry treatment processes produce orthophosphoric acid, the phosphate form that’s taken up by plants. The phosphoric acid produced by either the wet or dry process is frequently heated, driving off water and producing a superphosphoric acid.
How much phosphorus is in polyphosphate fertilizer?
Most polyphosphate fertilizers will have 40 to 60 percent of the phosphorus remaining in the orthophosphate form. In the soil, polyphosphate ions readily convert to orthophosphate ions in the presence of soil water. This conversion is rapid and, with normal soil temperatures, can be completed in days or less.
What is rock phosphate?
Rock phosphate is the raw material used to manufacture most commercial phosphate fertilizers on the market.
Why are white phosphoric acid fertilizers so expensive?
Fertilizers that use white phosphoric acid as the P source are generally more expensive because of the costly treatment process.
What is the most common product of superphosphoric acid?
Ammonia can be added to the superphosphoric acid to create liquid or dry materials containing both nitrogen (N) and P. The liquid, 10-34-0, is the most common product. The 10-34-0 can be mixed with finely ground potash (0-0-62), water and urea-ammonium nitrate solution (28-0-0) to form 7-21-7 and related grades.
Is citrate soluble or water soluble?
The sum of the water-soluble and citrate-soluble phosphates is considered to be the percentage that’s available to plants and is the amount guaranteed on the fertilizer label. Usually, the citrate- soluble component is less than the water-soluble component.
Overview
Hazards
Phosphorus pentoxide itself is not flammable. Just like sulfur trioxide, it reacts vigorously with water and water-containing substances like wood or cotton, liberates much heat and may even cause fire due to the highly exothermic nature of such reactions. It is corrosive to metal and is very irritating – it may cause severe burns to the eye, skin, mucous membrane, and respiratory tract even at concentrations as low as 1 mg/m .
Structure
Phosphorus pentoxide crystallizes in at least four forms or polymorphs. The most familiar one, a metastable form (shown in the figure), comprises molecules of P4O10. Weak van der Waals forces hold these molecules together in a hexagonal lattice (However, in spite of the high symmetry of the molecules, the crystal packing is not a close packing ). The structure of the P4O10 cage is reminiscent of adamantane with Td symmetry point group. It is closely related to t…
Preparation
P4O10 is prepared by burning tetraphosphorus with sufficient supply of oxygen:
P4 + 5 O2 → P4O10
For most of the 20th century, phosphorus pentoxide was used to provide a supply of concentrated pure phosphoric acid. In the thermal process, the phosphorus pentoxide obtained by burning white phosphorus was dissolved in dilute phosphoric acid to produce concentrated acid. Improvement…
Applications
Phosphorus pentoxide is a potent dehydrating agent as indicated by the exothermic nature of its hydrolysis producing phosphoric acid:
P4O10 + 6 H2O → 4 H3PO4 (–177 kJ)
However, its utility for drying is limited somewhat by its tendency to form a protective viscous coating that inhibits further dehydration by unspent material. A granular form of P4O10 is used in
Related phosphorus oxides
Between the commercially important P4O6 and P4O10, phosphorus oxides are known with intermediate structures.
On observation it will be seen that double bonded oxygen in at 1,2 position or 1,3 position are identical and both positions have same steric hindrance. Cycle 12341 and ABCDA are identical.
See also
• Eaton's reagent