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How to distinguish between sodium carbonate and potassium carbonate

2010-05-12View Original

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How to distinguish between sodium carbonate and potassium carbonate? I’m using a carbonate supported on aluminum oxide, but I have no idea which one it is. How can I distinguish between two substances?
Reply #22010-05-12
Is it okay to use a flame test? I remember learning before that potassium produces a purple color, while sodium produces a yellow color
Reply #32010-05-12
This flame test seems to require cobalt glass as well.
Reply #42010-05-13
Method 1: Flame test can be used for identification: Sodium carbonate produces a yellow flame, while potassium carbonate produces a purple flame. Relatively fast. Method 2: It can be identified through a chemical reaction: adding saturated potassium hexahydroxyantimonate solution results in the formation of white crystals, indicating that it is a sodium salt ; When saturated sodium hydrogen tartrate solution is added, white crystals form, indicating that it is a potassium salt. Method 3: It can be identified physically: the two have different relative molecular masses, but the difference isn’t very noticeable. 1# A person wandering far from home
Reply #52010-05-13
Although it seems not very useful, I still have to thank everyone!
Reply #62010-05-15
Chromatography can be used, in my opinion!

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