secondary 3 chevron_right Chemistry

I have a few doubts about Salt Preparation:

1) For insoluble salts, how do I go about explaining the process to prepare the salts. I'm aware of the methods (Precipitation,Acid+ Base/Carbonate/Metal) but I can't understand which insoluble salt is for which method and the process as well.

2) For titration, is there any difference between the reactions of acid+alkali and acid+soluble carbonate?

Thanks!