18.8 Occurrence, Preparation, and Properties of Phosphorus

Complete and balance each of the following chemical equations. (In some cases, there may be more than one correct answer.)

(a) $\text{P}_{4} + \text{Al} \rightarrow$

(b) $\text{P}_{4} + \text{Na} \rightarrow$

(c) $\text{P}_{4} + \text{F}_{2} \rightarrow$

(d) $\text{P}_{4} + \text{Cl}_{2} \rightarrow$

(e) $\text{P}_{4} + \text{O}_{2} \rightarrow$

(f) $\text{P}_{4} \text{O}_{6} + \text{O}_{2} \rightarrow$

What volume of 0.200 M NaOH is necessary to neutralize the solution produced by dissolving 2.00 g of PCl₃ is an excess of water? Note that when H₃PO₃ is titrated under these conditions, only one proton of the acid molecule reacts.

How many tons of Ca₃(PO₄)₂ are necessary to prepare 5.0 tons of phosphorus if the yield is 90%?

Assign an oxidation state to phosphorus in each of the following:

(a) NaH₂PO₃

(b) PF₅

(c) P₄O₆

(d) K₃PO₄

(e) Na₃P

(f) Na₄P₂O₇