Question

Ammonium phosphate ((NH4), PO,) is an important ingredient in many fertilizers. It can be made by reacting phosphoric acid (H;PO,) with ammonia (NH3)
What mass of ammonium phosphate is produced by the reaction of 8.29 g of phosphoric acid?
Round your answer to 3 significant digits.

Answer 1

Answer:   12.6 g

Explanation:

We have to first write an equation for the reaction that occurs:

H₃PO₄   +  3 NH₃     →       (NH₄)₃PO₄

Now, moles of H₃PO₄  = mass ÷ molar mass

                                     = 8.29 g ÷ 97.99 g/mol

                                     =  0.0846 mol

Now, the mole ratio of H₃PO₄ : (NH₄)₃PO₄ is 1  :  1

     ∴ since moles of H₃PO₄  = 0.0846 mol

     then moles of (NH₄)₃PO₄ = 0.0846 mol

∴ the mass of (NH₄)₃PO₄ produced = mol × molar mass

                                                          = 0.0846 mol  ×  149.09 g/mol

                                                          =  12.6 g