How do you get potassium nitrate out of a mixture with calcium carbonate?

Answer 1

calcium carbonate+ nitric acid. a strong acid would replace a weaker acid in most ionic compounds, so you would produce calcium nitrate and carbon dioxide.

well, being that nitric acid is widely UNAVAILABLE to most people, it is easy to find potassium or sodium nitrate. if you are going specifically for calcium nitrate you can double displace calcium carbonate with potassium or sodium nitrate resulting in potassium or sodium carbonate and (aq) calcium nitrate. the potassium or sodium carbonate will probably precipitate out much quicker than the nitrate depending on how exact your equation for displacement is. and you should be left with (aq) calcium nitrate. boil off the water and preferably recrystallize for purity. if youre using calcium carbonate just to get any form of nitrate, i recommend simply buying potassium nitrate. if it is not assessable in your area and are trying to get an oxidizer ( i assume thats why you are trying to make a nitrate) i recommend going with a chlorate or perchlorate, these are easier to make at home through electrolysis.

Answer 2

Add water and the potassium nitrate will dissolve. Calcium carbonate is virtually insoluble in water. Filter this mixture. Now evaporate water off the potassium nitrate solution and you get the material back as a solid. The calcium carbonate will remain on the filter paper and this will just need gentle drying.

Answer 3

calcium nitrate = Ca(NO3)2

sodium carbonate = Na2CO3