Phosphoric acid, which is commonly used as rust inhibitor, food additive and etching agent for dental and orthopedic use, can be synthesized using a two-step thermal process. In the first step, phosphorus and oxygen react to form diphosphorus pentoxide: (l)(g)(g) In the second step, diphosphorus pentoxide and water react to form phosphoric acid: (g)(l)(l) Write the net chemical equation for the production of phosphoric acid from phosphorus, oxygen and water. Be sure your equation is balanced.

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Mergus Mergus · Answer 1 · 2019-10-09T05:48:08+02:00

Answer:

[tex]P_4_{(I)}+5O_2_{(g)}+6H_2O_{(l)}\rightarrow +4H_3PO_4_{(l)}[/tex]

Explanation:

The first step is:

[tex]P_4_{(I)}+5O_2_{(g)}\rightarrow 2P_2O_5_{(g)}[/tex]

Second step is:

[tex]P_2O_5_{(g)}+3H_2O_{(l)}\rightarrow 2H_3PO_4_{(l)}[/tex]

Multiplying second step by 2, and adding both the steps, we get that:

[tex]P_4_{(I)}+5O_2_{(g)}+2P_2O_5_{(g)}+6H_2O_{(l)}\rightarrow 2P_2O_5_{(g)}+4H_3PO_4_{(l)}[/tex]

Cancelling common species, we get that:

[tex]P_4_{(l)}+5O_2_{(g)}+6H_2O_{(l)}\rightarrow +4H_3PO_4_{(l)}[/tex]