The Equilibrium Constant at 25 °C for the Dissolution of Silver

question 42

Multiple Choice

The equilibrium constant at 25 °C for the dissolution of silver iodide is
8.5 × 10^-17. AgI(s) $\rightleftharpoons$ Ag⁺(aq) + I^-(aq)
If an excess quantity of AgI(s) is added to water and allowed to equilibrate, what is the equilibrium concentration of I^-?

• A) 7.2 × 10^-33 M
• B) 4.3 × 10^-17 M
• C) 8.5 × 10^-17 M
• D) 6.5 × 10^-9 M
• E) 9.2 × 10^-9 M

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