A $978\mathrm{.}8$ mL aqueous solution of $859\mathrm{.}5$ mM Na$2$S is combined with $100\mathrm{.}0$ mL of an aqueous HCl solution whose HCl concentration is not known. The reaction produces $1\mathrm{.}733$ L of H$2$S gas at a pressure of $1\mathrm{.}00$ atm and a temperature of $24\mathrm{.}71$

$.$ There are sulfide ions still present in the solution after the reaction is complete. What was the concentration of HCl in the original HCl solution