A solution of NaF is added dropwise to a solution that is 0.0273 M in Mg2+ and 1.05e-08 M in Y³+. (a) What concentration of F is necessary to begin precipitation? (Neglect volume changes.) [F] = M. (b) Which cation precipitates first? Mg2+ O y3+ (c) What is the concentration of F" when the second cation begins to precipitate? [F] = The Ksp of MgF2 is 5.16e-11. The Ksp of YF3 is 8.62e-21. M.
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![A solution of NaF is added dropwise to a solution that is 0.0273 M in Mg2+ and 1.05e-08 M in y³+.
(a) What concentration of F" is necessary to begin precipitation? (Neglect volume changes.)
[F] =
M.
(b) Which cation precipitates first?
O Mg2+
O y3+
(c) What is the concentration of F when the second cation begins to precipitate?
[F] =
The Ksp of MgF2 is 5.16e-11.
The Ksp of YF3 is 8.62e-21.
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