Question

Are the salts lead iodide, lead sulfate, lead chloride, and barium sulfate, soluble in water?

Answer 1

There are obvious exceptions to the standard solubility rules.

Explanation:

`PbI_2`, `PbSO_4`, `PbCl_2`, `BaSO_4` are all insoluble in aqueous solvents. Did I miss any?

So in answer to your question, the combination `BaI_2`, and `KCl` is safe. As is `K_2SO_4` and `KCl`.