Is sodium chloride soluble in HCl?
ions solvated by water molecules. Just the same, NaCl will also dissolve in the solution. The ions will separate, attracted differently by the separated partial charges on the water molecule–the lone pairs of electrons on the oxygen atom, and the partial positive charge on the protons. Naturally, though, the solubility of salt will be lower in a solution of acid than in pure water. If you were to add NaCl to a highly concentrated solution of hydrochloric acid, I don’t think very much would dissolve since the acidic protons would be more strongly bound to the water molecules than the sodium cations would be. That’s probably a good thing, because otherwise the solution would begin to evolve hydrogen chloride gas: breathe that in, and your mucous membranes are toast.
