| Fehling's Solution |
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Information AboutFehling's Solution |
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Fehling's solution is always made just prior to the test. Two equal volumes of solutions are mixed: # 69.28 grams Copper(II) Sulfate pentahydrate and fill to 1 litre of solution with distilled water # 346 grams Rochelle Salt (potassium sodium tartrate tetrahydrate) and 120 grams Sodium Hydroxide and fill to 1 litre of solution with distilled water The cupric ion is Complexed with the tartrate ion. Contact with an aldehyde group reduces it to a cuprous ion, which then precipitates as red Cu2O ( Copper(I) Oxide ). Fehling's solution is nowadays often replaced by Benedict's Solution . EXTERNAL LINKS |
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