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

Problem 16.19

Write a chemical equation representing solubility equilibrium for (a) Hg2(CN)2, Ksp = 5×10–40; and (b) Ag3AsO4, Ksp = 1.0 ×10–22.




Answer:

(a) Hg2(CN)2(s)Hg22+(aq) + 2 CN(aq)

Ksp = [Hg22+]e[CN]e2

(b) Ag3AsO4(s)3 Ag+(aq) + AsO43–(aq)

Ksp = [Ag+]e3[AsO43–]e