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) + 5O2(g) -> 2P2O5(g) In the second step, diphosphorus pentoxide and water react to form phosphoric acid H3PO4
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) + 5O2(g) -> 2P2O5(g) In the second step, diphosphorus pentoxide and water react to form phosphoric acid H3PO4
Chemistry by OpenStax (2015-05-04)
1st Edition
ISBN:9781938168390
Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Chapter15: Equilibria Of Other Reaction Classes
Section: Chapter Questions
Problem 51E: Magnesium metal (a component of alloys used in aircraft and a reducing agent used in the production...
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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) + 5O2(g) -> 2P2O5(g)
In the second step, diphosphorus pentoxide and water react to form phosphoric acid
H3PO4
:
P2O5(g) + 3H2O(l) -> 2H3PO4(l)
Suppose the yield of the first step is
81.%
and the yield of the second step is
70.%
. Calculate the mass of phosphorus required to make
2.0kg
of phosphoric acid.
Be sure your answer has a unit symbol, if needed, and is rounded to the correct number of significant digits.
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