Diphosphorus trioxide

Phosphorus pentachloride Aluminum, chlorine, chlorine dioxide, chlorine trioxide, fluorine, magnesium oxide, nitrobenzene, diphosphorus trioxide, potassium, sodium, urea, water... 

P pentachloride causes ignition on contact with Al powder (Ref 2), while contact with a mixt of chlorine and chlorine dioxide usually results in expln, possibly due to formation of the more sensitive chlorine monoxide (Ref 5). Interaction with diphosphorus trioxide is rather violent at ambient temp (Ref 3) treatment with fluorine causes the entire mass to become incandescent (Ref 1). Ignition occurs when hydroxylamine is mixed with P pentachloride (Ref 6), while mixts with Mg oxide react with brilliant incandescence (Ref 7). The residue from interaction of P pentachloride and anilide in benz and removal of solvent and phosphoryl chloride in vacuo expld violently on admission of air (Ref 12). A soln of P pentachloride in nitrobenzene is stable at 110°, but begins to de-... 

Phosphorous Trioxide (Diphosphorus trioxide). P203, mw 109.95, transparent monocl crysts, mp 23.8°, bp 173.1° in nitrogen atm, d 2.135 g/cc. Exists as P406 when in vapor phase or in benz soln. Disproportio nates into red P and P204 when heated above 210°. Sol in benz and C disulfide. When placed in cold w, H3PC>3 is formed. Prepd by treating PCI 3 with tetramethyl ammonium sulfite in liq S02 > or from the elements (Ref 6). It is highly toxic (Ref 7)... 

Diphosphorus Trioxide. Violent interaction at room temperature.6... 

Phosphorus forms two well-defined oxides, namely, diphosphorus trioxide and diphosphorus pentoxide, having the empirical formulas P203 and P205 respectively an intermediate oxide, diphosphorus tetroxide, P204, and possibly the suboxides P40 and P20, are known. 

Diphosphorus trioxide, P2O3, melts at 23.8°C, and aluminum oxide, AI2O3, melts at 2045°C. What type of solid is each of these ... 

Ans. Phosphorus hes to the left and below oxygen in the periodic table, so it is named first. The number of atoms of the first element is specified because it is greater than one diphosphorus trioxide. 

Use diagrams of particles to explain why four atoms of phosphorus can produce only two molecules of diphosphorus trioxide, even when there is an excess of oxygen atoms. 

These empirical formulas could be named diphosphorus pentoxide and diphosphorus trioxide. The names according to the Stock system are given below with the formulas of the actual compounds. 

EXPLOSION and FIRE CONCERNS not combustible flammable by chemical reaction NFPA rating Health 3, Flammability 0, Reactivity 2 contact with water will cause violent spattering and formation of toxic hydrogen chloride gas and phosphoric acid mist elevated temperatures may cause containers to burst pressure will develop in closed containers when exposed to moisture reacts explosively with chlorine dioxide and chlorine, sodium, and urea and heat ignites on contact with fluorine forms explosive products with carbamates and 3 -methyl-2-nitrobenzanilide reacts violently with water, acids, alkalies, alkali metals, alcohols, amines and organic acids incompatible with aluminum chlorine dioxide, chlorine, diphosphorus trioxide, fluorine, hydroxylamine, magnesium oxide, nitrobenzene, sodium, urea, and water hazardous... 

Write balanced equations for the following reactions (a) potassium oxide with water, (b) diphosphorus trioxide with water, (c) chromium(III) oxide with dilute hydrochloric acid, (d) selenium dioxide with aqueous potassium hydroxide. 

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