Phosphoric acid, a mild acid used among other things as a

Last updated: 7/31/2022

Phosphoric acid, a mild acid used among other things as a rust inhibitor, food additive, and etching agent for cavity repair by dentists, can be made from elemental phosphorus in a two step process. In the first step, phosphorus and oxygen react to form diphosphorus pentoxide: In the second step, diphosphorus pentoxide and water react to form phosphoric acid (H,PO₁): P₂O(g) + 3H₂O(1) 2H, PO, (1) Suppose the yield of the first step is 88.% and the yield of the second step is 90.%. Calculate the mass of phosphorus required to make 1.0 kg of phosphoric acid. Be sure your answer has a unit symbol, if needed, and is rounded to 2 significant digits.