As Chemistry help molarity

Determine the molarity of the individual ions in the following:
2M Al(OH)3 4M Na2 SO4 1/2M Ca3 (PO4)2 0.5M Al2(SO4)3
3M K2 SO4
if you could explain how to work any one of these then I would appreciate it a lot thanks.

Ionic compounds dissociate 100% in solution, so if there are two ions in the formula unit then the concentration of ions in solution will be double that of the compound itself.

eg:

CuCl₂ -- (aq) --> Cu²⁺(aq) + 2Cl^-(aq)

If the copper(II) chloride concentration is 1M then the chloride concentration is 2M ...