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J. W. Hill, R. H. Petrucci, T. W. McCreary, & S. S. Perry General Chemistry 4th edition

Problem 16.20

Write a chemical equation representing solubility equilibrium for (a) YF3; Ksp = 6.6×10–13; and (b) Fe4[Fe(CN)6]3, Ksp = 3.3×10–41.






Answer:

(a) YF3(s) Y3+(aq) + 3 F(aq); Ksp = [Y3+]e[F]e3.



(b) Fe4[Fe(CN)6]3 (s) 4 Fe3+(aq) + 3 [Fe(CN)6]4–(aq); Ksp = [Fe3+]e4[Fe(CN)4–]e3.