Transcribed Image Text: 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

Transcribed Image Text: 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:
P4(s) + 502(g)
2 P,0, (g)
In the second step, diphosphorus pentoxide and water react to form phosphoric acid (H,PO,
P,0,(g) + 3H,0(1)
2 H,PO4 (1)
Suppose the yield of the first step is 90.% and the yield of the second step is 66.%. Calculate the mass of phosphorus required to make 4.0 kg of phosphoric
acid.
Be sure your answer has a unit symbol, if needed, and is rounded to 2 significant digits.
x10

-25-


Buy plagiarism free, original and professional custom paper online now at a cheaper price. Submit your order proudly with us



Essay Hope