Hydrochloric acid (HCl) is actually hydrogen chloride gas
dissolved in water. The solubility of hydrogen chloride in water at
298 K and 1 atm is 12.1 moles (442 grams) per liter of solution. In
what way can the solubility of hydrogen chloride in water be
increased to make the solution more concentrated?
A. Increase the volume.
B. Decrease the pressure.
C. Increase the temperature.
D. Decrease the temperature.