Question

Need a single reagent that I could use to distinguish NaI from NaNO3. NaOH, HCl, NH4Br, or Pb(NO3)2??

Answer 1

Are these in solution or are they solids?

Answer 2

They are aqueous solutions, yes, and I think NaOH would do it, but then again I also feel HCl would as well. Help please.