Formation of soluble silver-ammonium complex, in an AgCl solution, occurs in a 3-step process: AgCI(s) Ag* (aq) + CI(aq) Kup Ag*(aq) + NH,(aq) = AGNH, (aq) AGNH, (aq) + NH,(aq) Ag(NH,), (aq) K2 K, where K, is the solubility product for AGCI and K, & K2 are the equilibrium constants for the complex formation. The over-all formation constant (K,) for the Ag(NH,), complex is equal to K, x K2.
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Based on the chemical equation provided, which of the following is equivalent to K2?
a. [Ag+] [Cl-]
b. [AgNH3] / {[Ag+][NH3]}
c. [Ag(NH3)2+] / {[Ag(NH3)+][NH3]}
d. [Ag(NH3)2+] / {[Ag+][NH3+]2}
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