are cations soluble in water?
Ionic compounds with group 1 (or 1A) metallic cations or ammonium cations, NH4+, form soluble compounds no matter what the anion is. ... Compounds containing the chloride, Cl-, bromide, Br-, or iodide, I-, ion are water‑soluble except with silver ions, Ag+ and lead(II) ions, Pb2+.