For an experiment I need about 300g of finely powdered CaCO3.
Unfortunately all I got is Ca(OH)2, and plenty of it. Nothing easier
than that, I thought. Just dump it all into a large container, add
water, bubble air through it, using an aquarium air pump.
Unfortunately nothing ever is as easy as it seems, CO2 concentration
in air is just 0.03%, and my setup has been bubbling away happily for two
months now (yes I'm somewhat patient) and still is very heavily alkaline.
Investing money is not an option, so my only CO2 source unfortunately
probably will have to be air. Is there any way to speed up the reaction
in a reasonable way? Boiling the Ca(OH)2 solution in a large stainless
steel pot comes to mind, perhaps?