Use values of Ksp and Kf for copper(II) hydroxide and its complex to predict if

Question

Use values of Ksp and Kf for copper(II) hydroxide and its complex to predict if a precipitate shuold form in a 0.1M Cu2+ solution that is 3M in OH-

I want to know how to solve this problem by using the Ksp and Kf... NOT USING Q>K !!!!!

1) First of all I want someone to explain what i means by, "use values of ksp and Kf for copper(II) hydroxide and it's complex" <--- what does this mean??

2) I found that the Ksp for Cu(OH)2 is 2.2E20... and the Kf is nowhere to be found. The only thing I have is the Kf for Cu(NH3)4+, which I think might be the value i need to use in this problem- someone please clear up my confusion on this.

3) Finally, please solve this problem the way the question is asked and you will be awarded full points and 5 stars.

I had to repost this problem because people were just answering using the Q>K method and it's very frustrating to me that they cannot follow simple instructions.

Explanation / Answer

Cu(OH)2 <----> Cu2+ + 2OH- Ksp = 2.2 x 10^-20

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