International Chemistry Olympiad · 1968
Problems
- Problem 1A 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?Solutions: 1
- Problem 4A volume of 31.7 cm of a 0.1-normal NaOH solution is required for the neutralisation of 0.19 g of an organic acid whose vapour is thirty times as dense as gaseous hydrogen. Give the name and structural formula of the acid. (The acid concerned is a common organic acid.)Solutions: 1