solvin for a reactant using a chemical equation

Question

Ammonium phosphate NH43PO4 is an important ingredient in many fertilizers. It can be made by reacting phosphoric acid H3PO4 with ammonia NH3.

What mass of ammonium phosphate is produced by the reaction of 5.64g of phosphoric acid?

Answer 1

Write a correctly balanced equation for this reaction:

3NH₃ + H₃PO₄ ==> (NH₄)₃PO₄ ... balanced equation

Use dimensional analysis and the stoichiometry of the balanced equation to solve:

5.64 g H₃PO₄ x 1 mol H₃PO₄ / 98 g x 1 mol (NH₄)₃PO₄ / mol H₃PO₄ x 149 g (NH₄)₃PO₄ /mol = 8.58 g (NH₄)₃PO₄