DoingKermit wrote:I thought calcium hydroxide + sodium carbonate = sodium hydroxide
Exactly.
And,
calcium hydroxide + potassium carbonate = potassium hydroxide
Says so right on the wiki page.
Historically KOH was made by boiling a solution of potassium carbonate (potash) with calcium hydroxide (slaked lime), leading to a metathesis reaction which caused calcium carbonate to precipitate, leaving potassium hydroxide in solution:
Ca(OH)2 + K2CO3 → CaCO3 + 2 KOH
Filtering off the precipitated calcium carbonate and boiling down the solution gives potassium hydroxide ("calcinated or caustic potash"
. This method used potash extracted from wood ashes using slaked lime.
And another awesome article on bases dug up from google-
http://www.cavemanchemis...m/oldcave/projects/lime/"let those who have talked to the elves, find each other and band together" -TMK
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