(Solved): Chlorine gas and aluminum metal can be produced from the decomposition of the ionic solid, aluminum ...

Chlorine gas and aluminum metal can be produced from the decomposition of the ionic solid, aluminum chloride by the following reaction: \( 2 \mathrm{AlCl}_{3}(\mathrm{~s}) \rightarrow 2 \mathrm{Al}(\mathrm{s})+3 \mathrm{Cl}_{2}(9) \) Calculate the mass of aluminum chloride needed to collect \( 875 \mathrm{~mL} \) of chlorine gas by water displacement at \( 21,1^{\circ} \mathrm{C} \) and atmospheric pressure of \( 785 \mathrm{~mm} \mathrm{Hg} \). The water vapor pressure at \( 21.1^{\circ} \mathrm{C} \) is \( 18.8 \) torr.