HETEROGENEOUS REACTIONS IN LIQUID SULFURIC-ACID - HOCL+HCL AS A MODELSYSTEM

We describe detailed studies of the interaction of HCl and HOCl with 6 0 wt % liquid sulfuric acid at 251-276 K as an example of research aim ed at understanding the heterogeneous chemistry of the stratosphere. T he theory of gas/particle kinetics coupled with measurements of the up take of HCl and HOCl by bulk and particulate 60 wt % sulfuric acid yie ld the solubilities of HCl and HOCl, the HCl and HOCl mass accommodati on coefficients, the HCl + HOCl liquid-phase rate coefficient, and the HOCl liquid-phase diffusion coefficient. These results are in very go od agreement with theoretical predictions and extrapolations of other independent results.