Exercise 83. Sulfuryl Chloride

After some hours standing—best until the next morning—the test tube is heated on a water bath, and the liquid is distilled off. If the distillate contains free chlorine, a little mercury is added and shaken with the liquid, which is then redistilled after filtration through a dry asbestos mat on a Witte plate. The final distillation should take place from a flask furnished with a thermometer, and the liquid should boil at 69.5°. It should be preserved in a sealed tube. The camphor may be used indefinitely, as it takes part in a cycle of reactions and is left at the end of the reaction in very nearly its original state. 

Sulfuryl Chloride—Alternate Method.—Set up the apparatus represented in Fig. 22. A is a large test tube 

Fill A with well-activated charcoal to within 1 to 2 cm. of the overflow tube E. Immerse A in D and conduct in the two gases sulfur dioxide and chlorine, in equal volumes, best from cylinders of compressed gas. Action begins at once with considerable heat evolution, and after a time the union of the gases becomes almost quantitative. The flow of the two gases should be regulated so that the least number of bubbles escapes through the liquid collecting in A. Temperature is of 

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As described in Exercise 14.41, the decomposition of sulfuryl chloride (SO2CI2) is a first-order process. The rate constant for the decomposition at 660 K is 4.5 X 10 s . (a) If we begin with an initial SO2CI2 pressure of 450 torr, what is the partial pressure of this substance after 60 s (b) At what time will the partial pressure of SO2CI2 decline to one-tenth its initial value ... 

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