Salt Solubilities Can Be Compared by the Concentration of Cation

question 75

Multiple Choice

Salt solubilities can be compared by the concentration of cation formed when the salt dissolves in the general reaction: M_aX_b(s) ⇌ a M^b+(aq) + b X^a-(aq) .Given the following salts and their equilibrium constants for the reaction above at 25°C,which salt is the least soluble?

• A)AgCl,K_c = 1.8 × 10^-10
• B)Ag₂SO₄,K_c = 1.2 × 10^-5
• C)CaCO₃,K_c = 2.6 × 10^-9
• D)CaF₂,K_c = 1.5 × 10^-10

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