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18. Aqueous Equilibrium

Complex Ions: Formation Constant

18. Aqueous Equilibrium

Complex Ions: Formation Constant

Multiple Choice
What concentration of Cu2+ is needed to have a concentration of Cu(CN)4^2- equal to 2.0 x 10^-5 M in a solution with a [CN^-] of 9.3 x 10^-4 M? Kf of Cu(CN)4^2- = 1.0 x 10^25
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Multiple Choice
Which of the following best explains why the formation of complex ions can increase the solubility of otherwise insoluble compounds?
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Multiple Choice
If your equilibrium constant K is equal to the product of K_sp and K_f, find the solubility of AgCl in 2.0 M NH₃. K_sp of AgCl = 1.77 × 10⁻¹⁰; K_f of Ag(NH₃)₂⁺ = 1.7 × 10⁷.
Multiple Choice
A solution is composed of 3.20 × 10⁻⁴ M Co(NO₃)₃ mixed with 0.200 M NH₃. Determine the [Co³⁺] that remains once the solution reaches equilibrium in the formation of Co(NH₃)₆³⁺.
Multiple Choice
A solution contains 2.2 × 10^-3 M in Cu2+ and 0.33 M in LiCN. If the formation constant (Kf) for the complex ion Cu(CN)4^2- is 1.0 × 10^25, how much copper ion (Cu2+) remains at equilibrium?
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