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The water solubilities of oxalic acid and sodium oxalate at room temperature are 10g/100ml and 3.7...

The water solubilities of oxalic acid and sodium oxalate at room temperature are 10g/100ml and 3.7 g/100ml, respectively. Could you prepare oxalic acid by adding HCl to a solution of sodium oxalate, cooling it to room temperature and then filtering the resulting mixture? Explain why or why not.

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If we compare the solubility of oxalic acid and sodium oxalate we can see that oxalic acid is more soluble in water compared to sodium oxalate at room temperature. So if we take a solution of sodium oxalate and add HCl to it, oxalic acid will form in the solution. However due to greater solubility value, the oxalic acid will remain in the solution. Suppose we take saturated solution of sodium oxalate and add HCl to it. The oxalic acid solution formed will not be saturated. So it will not precipitate from the solution and by filtering we can not separate it out. So the answer is no, we cannot separate oxalic acid by the given procedure.

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