How to balance this equation? 3NH3 + H3PO4 _________ 3(NH4)3PO4 (The numbers that are in italic are subscripts.)

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gsenviro | College Teacher | (Level 1) Educator Emeritus

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The given chemical reaction involves the reactants (ammonia and phosphoric acid) generating ammonium phosphate. 

The reaction can be balanced as:

`3 NH_3 + H_3PO_4 -> (NH_4)_3PO_4`

That is 3 moles of ammonia react with 1 mole of phosphoric acid to generate 1 mole of ammonium phosphate. Here, we can count the number of each atom to ensure we have the same number of each atom on each side of the reaction. 

On the reactant side:

Number of Nitrogen atoms : 3

Number of Hydrogen atoms: 3 x 3 + 3 = 12

Number of Phosphorus atoms: 1

Number of Oxygen atoms: 4

On the product side:

Number of Nitrogen atoms: 3

Number of Hydrogen atoms: 4 x 3 = 12

Number of Phosphorus atoms: 1

Number of Oxygen atoms: 4

Since the number of each atom is same on both sides, the chemical reaction is balanced.

Hope this helps. 

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