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Name: Rik H.
Status: student
Age: 20s
Location: N/A
Country: N/A
Date: 2000


Question:
What governs double decomposition reactions? For example, if one was to put ammonium sulphate and sodium nitrate in solution, would a reaction occur? Would the sodium sulphate be soluble? Is there a way of separating the Na2SO4 from the mixture?


Replies:
The classification scheme of "double decomposition" and its cousins has pretty much been abandoned. There are too many exceptions, and qualifications. The "reaction" you cite is a good example. The two salts would just dissolve and the ions would just be there. There would not be any reaction in the classical sense.

Both of the compounds you mention are very water soluble, and I think it would be difficult to exchange the cation and anion.

Vince Calder



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