Aqua Regia will dissolve gold. Aqua Regia is a mixture of Nitric acid and Hydrochloric acid.
"insoluble"
Yes.
no
salt
Better in Water(H2O)
NAOH
No because of the acidic acid
Because ethanol is not a polar solvent.
solibility
Any non-polar substance will not dissolve in water (insoluble).
Barium chloride or BaCl2
no because salt comes from water n is at the bottom of oceans that is what you called salt waters and