[Boxxxed]

I have the log K of this reaction to be 2.31 but I don't know what the reaction is for the formation.

I have Cu2+ +H2SO4 ----> CuSO4 + 2H+

Is this correct?

If so, how would I calculate the ratio of Cu2+ to CuSO4.

All I have is the cu2+ concentration, CuSO4 concentration and the H+ concentration.

[Borek]

Please elaborate - what is the real problem you are trying to solve, I find your question confusing.

H₂SO₄ doesn't exist in solutions, unless its a highly concentrated sulfuric acid.

What is CuSO₄ - ion pair? Complex? Not that they are easy to distinguish, but it would be nice to know in what context we are discussing the problem.

[Boxxxed]

It is a CuSO4 complex. I have the SO4 concentration in a lake and I'm trying to figure out the ratio of free Cu to the complex in this lake. I also have the pH of the lake.

[Borek]

If it is in the lake you don't have H₂SO₄ to start with, plus you most likely have plenty of other ions/molecules that will react with copper.