hmm...then is the least soluble salt among the 4 salts mentioned here AgI? If it is, then is it that the equation will look like this:
PbI
2 + 2AgCl
PbCl
2 + 2AgI ?
then, is this reaction reversible or not? and most important question, how do PbI
2 & AgCl react when they don't exist as aqueous form? How do the ions collide and react?
sorry I like to ask questions haha