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) + 50,(g) 2 P,05 (g) In the second step, diphosphorus pentoxide and water react to form phosphoric acid (H,PO,): P2O3(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.
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) + 50,(g) 2 P,05 (g) In the second step, diphosphorus pentoxide and water react to form phosphoric acid (H,PO,): P2O3(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.
Chemistry for Engineering Students
4th Edition
ISBN:9781337398909
Author:Lawrence S. Brown, Tom Holme
Publisher:Lawrence S. Brown, Tom Holme
Chapter4: Stoichiometry
Section: Chapter Questions
Problem 4.79PAE: 4.79 Phosphoric add (H3PO4) is important in the production of both fertilizers and detergents. It is...
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![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](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fef4b6adc-ecac-4a2c-a488-33a127483969%2F05e5c8ab-1f21-4128-80ca-eeb592fbdc42%2F9p7orl_processed.png&w=3840&q=75)
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
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