Conversion of Sodium Bicarbonate into Sodium Carbonate
Pour sodium bicarbonate onto a non-aluminum pan.
Place in the oven at 400ºF for one hour
Place in a storage container and store away from moisture.
NOTE
This can also be done on a stove top/oven ring in a pot and take around 5-10 minutes to completely dehydrate (it becomes a fine light white powder and the CO2 stops bubbling through the powder).