Vapor pressure for sulfurous acid (SO2 aq soln)

[tnatale]

I'm looking for data on the vapor pressure of sulfurous acid (SO2 in an aqueous soln). The references that I've found are very incomplete in this area.

Thanks,

 

[ash9144]

Check Perry's

 

[kenvlach]

Some info here:

http://www.sulphuric-acid.com/techmanual/Properties/properties.htm

 

[bimr]

http://www.qvf.com/en/ProcessSystems_3/Mineral Acids/ConcentrationingofSulfuricAcid.shtml

If you do not have access to a technical library, you can contact suppliers such as Dupont for the informatino.

 

[siretb]

from perry's handbook, 1/H (mole/liter)/Pa

20°C 1.565e-5
30 1.19e-5
40 9.08e-6
50 7.08e-7
60 5.49e-6

keep in mind that SO2 or H2SO3 is a weak acid, and that if the pH is above 2, some of the SO2 will be hidden as HSO3- or SO3--ions