The concentration of the complex ion in each of following solutions is 1.00 M. In which of the solutions will the concentration of the uncomplexed metal ion be the greatest? Hg(CN) ₄²⁻ K_f = 9.3 × 10³⁸
Be(OH) ₄²⁻ K_f = 4.0 × 10¹⁸
Zn(OH) ₄²⁻ K_f = 3.0 × 10¹⁵
Cu(NH₃) ₄²⁺ K_f = 5.6 × 10¹¹
CdI₄²⁻ K_f = 1.0 × 10⁶

Question

Quizplus · Accepted Answer

The concentration of the uncomplexed metal ion is inversely related to the stability constant (Kf) of the complex ion. The complex with the lowest Kf value will have the greatest concentration of the uncomplexed metal ion. CdI4^2- has the lowest Kf value (1.0 × 10^6), indicating that Cd^2+ will have the greatest concentration of uncomplexed metal ion.

The Concentration of the Complex Ion in Each of Following