Chlorine gas can be prepared in the laboratory by the reaction of manganese dioxide with hydrochloric acid:
MnO2(s) + 4HCl(aq) --> MnCl2(aq) + 2H2O(l) + Cl2(g)
How much MnO2 should be added to excess HCl to obtain 275mL of chlorine gas at 5.0C and 650 mmHg?
Use the ideal gas law to find the number of moles of chlorine gas.
Pressure in atm = 650 mmHg (1 atm/760 mmHg) = 0.855 atm
number of moles Cl2 = PV/RT = [(0.855 ...
This complete solution uses the ideal gas law to do calculations and find the answer.