For the reaction between solid tetraphosphorus trisulfide and oxygen gas to form solid tetraphosphorus decoxide and sulfur dioxide gas, write a balanced equation. Show the equation (see Table 3.4) in terms of (b) moles, and



Answer :

1 mole of [tex]P_{4} S_{3}[/tex] reacts with 8 moles of [tex]O_{2}[/tex] to form 1 mole of [tex]P_{4}O_{10}[/tex] and 3 moles of [tex]SO_{2}[/tex]

What is a tetraphosphorus decoxide?

Tetraphosphorus decoxide, ([tex]P_{4}O_{10}[/tex]) is a non-metal oxide that gives acidic property when dissolved in water.

The name phosphorus decoxide can be interpreted as 4 phosphorus (P) atoms (‘Tetra’), bonds with 10 oxygen (O) atoms (‘Dec’) in a molecule. besides that, it is also known as phosphorus pentoxide.

It can be prepared by heating pure phosphorus with oxygen in blast furnace.

[tex]P_{4}[/tex] + [tex]5O_{2}[/tex] → [tex]P_{4}O_{10}[/tex]

It is used as a dehydrating agent due to its week van der Waals dispersion forces. Thus, owing to give exothermic reaction when dissolved in watermore precisely, it is a white crystalline anhydrous (without water molecule) solid.

In granular form it can be also used as desiccant as well.

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