Tetraphosphorus decoxide

A chemist is about to synthesize tetraphosphorus decoxide by combining X grams of phosphorus with sufficient oxygen to react completely with the phosphorus. If he wants to determine the amount of tetraphosphorus decoxide that will be produced, all of the following need to be answered before initiating the experiment EXCEPT —... 

Phosphorus (V) oxide or tetraphosphorus decoxide, P4O10, is the anhydride of the series of phosphoric acids. It is produced in the first step of the manufacture of H3P04 by burning phosphorus,... 

Tetraphosphorus decoxide, P4O10, is an acidic oxide. It reacts with water to produce phosphoric acid, H3PO4, in an exothermic reaction. P40io(s) + 6H20(i) 4H3P04(aq) AH°rxn = -257.2 kJ... 

When phosphorus is burnt, tetraphosphorus decoxide is produced. The reaction equation is as follows ... 

Oxides and Oxoacids of Phosphorus When phosphorus burns in air or oxygen, it yields tetraphosphorus hexoxide (P4Og, mp 24°C) or tetraphosphorus decoxide (P4Oio, mp 420°C), depending on the amount of oxygen present ... 

When solid white phosphorus, P4, is burned in air, it reacts with oxygen to produce solid tetraphosphorus decoxide, P4O10. When water is added to the P4O10, it reacts to form aqueous phosphoric acid, H3PO4. Write and balance the chemical equations that represent these reactions., ... 

How many molecules are in a 64.3 mg sample of tetraphosphorus decoxide, P4O10 ... 

Because the actual formula for phosphorus(V) oxide is P4O10, the compound can also be named as tetraphosphorus decoxide. It is the anhydride of the phosphoric acids and as such it is produced as the first step in the manufacture of H3P04. It is readily obtained by burning elemental phosphorus ... 

Ans. (a) Tetraphosphorus decoxide (b) Dichlorine monoxide (c) Chlorine dioxide... 

Tetraphosphorus decoxide Ojo), which was formerly represented as P205 and called phosphorus pentoxide, has a great affinity for watdr and thus is a powerful dehydrating agent. For example, it can be used to convert HNO3 and H2S04 to their parent oxides, N205 and SO3, respectively. 

When tetraphosphorus decoxide dissolves in water, phosphoric acid (H3PO4), also called orthophosphoric acid, is produced ... 

The white phosphorus is burned in air to form tetraphosphorus decoxide, which is then combined with water to give phosphoric acid. 

Toluene should be dried over tetraphosphorus decoxide overnight and then degassed immediately before use by condensation into a U trap on the vacuum line. 

The reaction between solid white phosphorus and oxygen produces solid tetraphosphorus decoxide (P4O10). This compound is often called diphosphorus pentoxide because its empirical formula is P2O5. 

Phosphorus, P4, burns with excess oxygen to form tetraphosphorus decoxide, P40[q. In this reaction, what mass of P4 reacts with 1.50 moles of O2 ... 

We allow 272 grams of phosphorus to react with excess oxygen, which forms tetraphosphorus decoxide, P4O1Q, in 89.5% yield. In the second step reaction, a 96.8% yield of H3PO4 is ob-... 

In the second step, the step on which we will focus in this chapter, the phosphorus, P, is reacted with oxygen in air to form tetraphosphorus decoxide, P4O10 ... 

We have seen that the molecular compound tetraphosphorus decoxide, P4O10, is one of the substances needed for the production of phosphoric acid. 

To find a conversion factor that converts from moles of phosphorus to moles of P4O10, we look at the formula for tetraphosphorus decoxide, P4O10. It shows that each molecule of tetraphosphorus decoxide contains four atoms of phosphorus. By extension, one dozen P4O10 molecules contains four dozen P atoms, and one mole of P4O10 (6.022 x 10 P4O10 molecules) contains four moles of phosphorus (4 times 6.022 X 10 P atoms). Thus the formula P4O10 provides us with the following conversion factor ... 

Following the strategy demonstrated in Example 9.6, we calculated the maximum mass of tetraphosphorus decoxide, P4O10, that can be made from 1.09 X 10 kilograms of phosphorus in the second of these three reactions. The answer is 2.50 X lO kg P4O10. We used the following steps ... 

The ratio of moles of P4O10 to moles of P (which came from the subscripts in the chemical formula, P4O10) provided the key conversion factor that allowed us to convert from units of phosphorus to units of tetraphosphorus decoxide. 

Now let s assume that you have been transferred to the division responsible for the final stage of the process, the step in which tetraphosphorus decoxide is converted into phosphoric acid in the third reaction in the list displayed above. Your first assignment there is to calculate the mass of water in kilograms that would be necessary to react with 2.50 X 10" kg P4O10. The steps for this conversion are very similar to those in Example 9.6 ... 

Let s return to the reaction of solid tetraphosphorus decoxide and water. 

Chemists commonly want to convert from the amount of one substance in a chemical reaction to an amount of another substance in that reaction. For example, they might want to calculate the maximum amount of a product that can be formed from a certain amount of a reactant, or they might want to calculate the minimum amount of one reactant that would be necessary to use up a known amount of another reactant. Chapter 10 showed how to do conversions like these. In Example 10.1, we calculated the minimum mass of water in kilograms necessary to react with 2.50 X lO kg of tetraphosphorus decoxide, P4O10, in the reaction P40io(r) + 6H20(/) AU VO iaq)... 

---