I want to make a oversaturated salt solution of 5gr of Lithium iodide, another one of 5 gr of sodium iodide , 5gr of magnesium nitrate, 5 gr of potassium carbonate and the last one: 5 gr of cobalt chloride ?

1 Answer
anor277
May 16, 2018

There are no data here, and there ain't no such beast as #"oversaturation...."#

Explanation:

#"Supersaturation"# describes the solubility of a salt in solution, such that the SOLUBILITY IS GREATER than that which would be in equilibrium with UNDISSOLVED solute...and thus supersaturation is a metastable condition, the which can be easily reversed by the introduction of a seed crystal or a site of nucleation to give saturated solutions....for which the solubility of the salt is equal to that solubility which would be in equilibrium with undissolved solute....

As to your proposed solutions, we have no data to establish the saturation point, the equilibrium condition... Most methods of producing a supersaturated solution involve taking a SATURATED SOLUTION, with EXCESS, UNDISSOLVED solute, and giving it a good blast with a heat gun to bring all the solute into solution. Upon cooling the solute might NOT precipitate, and thus a condition of #"supersaturation"# applies....

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