Calculate the concentration of F- present in the Mg2+/Y3+ solution when the first (initial) cation begins to precipitate, and the concentration of F- present in this solution when the second (final) cation begins to precipitate. Write down which cation precipitates first and which precipitates second (last). Choose the correct statement from below based on your work. a) The molarity of F- which begins to precipitate the initial cation is 4.06e-12 M. b) The molarity of F- which begins to precipitate the initial cation is 4.43e-25 M. c) The last metal cation to precipitate is Y3+ . d) The molarity of F- which begins to precipitate the final cation is 1.00e-06 M. e) The molarity of F- which begins to precipitate the final cation is 2.56e-05 M.

Chemistry by OpenStax (2015-05-04)
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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 17E: Assuming that no equilibria other than dissolution are involved, calculate the concentration of all...
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A solution of NaF is added dropwise to a solution that is 7.87e-02 M in Mg2+ and 5.14e-05 M in Y3+.

The Ksp of MgF2 is 5.16e-11.
The Ksp of YF3 is 8.62e-21.

Calculate the concentration of F- present in the Mg2+/Y3+ solution when the first (initial) cation begins to precipitate, and the concentration of F- present in this solution when the second (final) cation begins to precipitate. Write down which cation precipitates first and which precipitates second (last). Choose the correct statement from below based on your work.




a) The molarity of F- which begins to precipitate the initial cation is 4.06e-12 M.
b) The molarity of F- which begins to precipitate the initial cation is 4.43e-25 M.
c) The last metal cation to precipitate is Y3+ .
d) The molarity of F- which begins to precipitate the final cation is 1.00e-06 M.
e) The molarity of F- which begins to precipitate the final cation is 2.56e-05 M.
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Chemistry by OpenStax (2015-05-04)
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Chemistry
ISBN:
9781938168390
Author:
Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Publisher:
OpenStax