Naming ionic compounds using the stock system?

Can someone tell me the names of the following?


NaCl


KF


CaS


Co(NO3)2


FePO4


Hg2SO4


Hg3)PO4)2


If you can add a short explanation on how you came to that conclusion, on just one of these. Then that would be aweseome! But thats just extra! PLEASE HELP!

Naming ionic compounds using the stock system?
sodium chloride


potassium flouride


calcium II sulfide (because calcium forms a +2 cation, and sulfide forms a -2 anion)


cobalt II nitrate (because there is the 2 after nitrate, it means that Co has a +2 Cation, and nitrate forms only a -1 anion)


Iron III phosphate


Mercury sulfate ( it is sulfate not sulfide because of the Oxygen)


Mercury II phosphate ( the phosphate has a -3 anion that goes after Hg, and Mercury II has a +2 cation that goes after the phosphate)


I hope this helps, but the only way to get better is practice, trust me I've been there!!
Reply:Sodium chloride


Potassium fluoride


Calcium sulfide


Cobalt (II) nitrate


Iron (III) phosphate


Mercury (I) sulfate


Mercury (II) phosphate