What do I do?

Question

a)Devise a scheme for separating Al(NO3)3, AgNO3, Ca(NO3)2 and KNO3 from each other.

b)How could you isolate KNO3 from the solution in a.?

What aluminum, silver, and calcium salts are insoluble? Given those, could you make those salts by adding the approprate acid?

what do you mean by adding acids?...any acid? will the same acid separate each?

Answer 1

1) Add HCl to precipitate silver ions as AgCl
2) Add H2SO4 to precipitate calcium ions as CaS04
3) Add H3PO4 to precipitate aluminum ions as AlPO4.
4) Evaporate water to get potassium ions.