Uh, don't forget the Ag+
Ode
At 12:32 PM 12/20/2005 -0500, you wrote:
Adding a very small amount of baking soda to distilled water that has
picked up
some CO2 and formed carbonic acid is very interesting to analyze.
CO2 + H2O -> H2CO3 or carbonic acid
NaHCO3 + H2CO3 -> NaOH + 2CO2 + H2O
If you don't add enough bicarb to neutralize all the carbonic acid, then you
can get this reaction as well:
2NaOH + H2CO3 = Na2CO3 + 2H2O
but then sodium carbonate should react with carbonic acid as well producing:
Na2CO3 + H2CO3 -> 2NaOH + 2CO2
Which puts us right back to the Sodium Hydroxide again.
So unless I am mistaken, the smallest pinch possible of baking soda (or lye)
would neutralize 100% of the carbonic acid in distilled water that has
absorbed
CO2, and as long as no more is added than is necessary to cause all the CO2 to
be released, the effect will be a DECREASE in carbonate, not an increase. The
sodium hydroxide acts as a catalyst to release CO2. I have put this question
to some chemists for confirmation and should have a reply shortly.
This appears to be a very interesting topic that needs more study.
Marshall
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