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Assuming you mean soluble in water - in theory, yes, it would be referred to as sulfurous acid - HOWEVER, there is no evidence that it actually exists in solution. The closest you would come to find is HSO3- and H3O+ from the H2SO3 dissociating into SO2 and 2 H2O as soon as it got into the water.

See http://en.wikipedia.org/wiki/Sulfurous_acid and the references contained in that article

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12y ago

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