Chemistry: Could someone please answer this question about solubility?

Question

From this link...

http://au.answers.yahoo.com/question/index?qid=20080810022516AATCd5E&r=w

Answer 1

both of your other two answerers are right on your first listing,

yes there is some H2CO3 dissolved in the water.

but it primarily exist as CO2 & water:

H2CO3 --> H2O  & CO2

so because there is so little H2CO3 actually dissolved, we say one of two things:

1)very  minimal solublity in water

or  2) decomposes  ( into  H2O & CO2)

take a look at:

http://en.wikipedia.org/wiki/H2CO3