A solution of NaF is added dropwise to a solution that is 0.0660 M in Mg2+ and 1.96e-08 M in Y3+.
The Ksp of MgF2 is 5.16e-11.
The Ksp of YF3 is 8.62e-21.
your paper for you
(a) What concentration of F– is necessary to begin precipitation? (Neglect volume changes.)
[F–] = ______ M.
(b) What is the concentration of F– when the second cation begins to precipitate?
[F–] =______ M.
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