[Mal1ce]

The Problem:
The solubility-product constant for K₂PdCl₆ is 6.0 x 10^-6 (K₂PdCl₆ <--> 2K⁺ + PdCl^2-₆).  What is the K⁺ concentration of a solution prepared by mixing 50.0 mL of 0.400 M KCl with 50 mL of 0.100 M PdCl^2-₆.

The first thing I did was find the new concentrations of K⁺ and PdCl^2-₆, [K⁺] = 0.2 M and  [PdCl^2-₆] = 0.05 M. Here is where I am stuck.  I am assuming that these new concentrations are the initial concentrations and I need to find the equilibrium concentration of K⁺.  How do I use these initial concentration and the solubility-product constant to find the concentration of K⁺? Do I need to use the ICE box to solve this problem? If anyone could walk me through on how to solve this problem it would be greatly appreciated.  Thanks in advance.

[Borek]

Limiting reagent.

[Mal1ce]

I don't understand how this is a limiting reagent problem.

[Borek]

Are they mixed in stoichiometric amounts?