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 P₂O5 (g) In the second step, diphosphorus pentoxide and water react to form phosphoric acid (H₂PO4): P₂O(g) + 3H₂O(1) 2 H₂PO4 (1) 1 Suppose the yield of the first step is 67.% and the yield of the second step is 70.%. Calculate the mass of phosphorus required to make 3.0 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) + 50₂(g) → 2 P₂O5 (g) In the second step, diphosphorus pentoxide and water react to form phosphoric acid (H₂PO4): P₂O(g) + 3H₂O(1) 2 H₂PO4 (1) 1 Suppose the yield of the first step is 67.% and the yield of the second step is 70.%. Calculate the mass of phosphorus required to make 3.0 kg of phosphoric acid. Be sure your answer has a unit symbol, if needed, and is rounded to 2 significant digits.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

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Concept explainers

Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".

Question

Reaction sequence stoichiometry
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 P₂05 (8)
1
In the second step, diphosphorus pentoxide and water react to form phosphoric acid (H₂PO4):
P₂O(g) + 3H₂O(1) - 2 H3PO4 (1)
Suppose the yield of the first step is 67.% and the yield of the second step is 70.%. Calculate the mass of phosphorus required to
make 3.0 kg of phosphoric acid.
Be sure your answer has a unit symbol, if needed, and is rounded to 2 significant digits.
0
Explanation
Check
0
x10
8
X
ロ・ロ
G
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