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The Ksp values of CuCO3 and ZnCO3 are 1.4×1010 and 1.4×1011, respectively. Does this mean that CuCO3 has ten times the solubility of ZnCO3? Explain.
Although the equilibrium constants differ by a factor of ten, the solubilities of each compound do not differ by a factor of ten. The solubility of a compound is determined from the value of Ksp and the stoichiometry of the ionization reaction. In this case, the solubilities of the two compounds differ by about a factor of 3.2.