Quote Originally Posted by sanking
I don't know how to explain why some people have difficulty in getting 1000g of potassium carbonate to go into solution in 1000ml of water. But I think the secret is to add the carbonate to the water very slowly, with constant stirring. It never takes me more than a couple of minutes to get it all into solution when I add it this way.
My guess is that they take 1 kg potassium carbonate and try to make 1 liter finished solution, instead of combining 1 liter of water and one kilo potassium carbonate...

It's no problem at all dissolving it - but then again I "cheat" and use a magnet stirrer!