Problem 1
A mixture of hydrogen and chlorine kept in a closed flask at constant temperature was irradiated by scattered light. After a certain time the chlorine content had decreased by 20 % compared with that of the starting mixture, and the resulting mixture had the composition: 60 volume % chlorine, 10 volume % hydrogen and 30 volume % hydrogen chloride. (a) What was the composition of the initial gaseous mixture? (b) How are chlorine, hydrogen and hydrogen chloride produced industrially?
Step 2 of 3: Initial composition
Analysis
Adding the consumed volumes back to the measured final composition gives 75 % Cl2 and 25 % H2. Check: Cl2 fell from 75 to 60, i.e. exactly by 20 % as stated.