Fehling's solution
What Fehling's solution means in Chemistry A-Level, as defined for AQA, OCR.
Definitions of Fehling's solution
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Reference: OCR
A blue solution containing Cu²⁺ complexes in alkaline tartrate, which an aldehyde reduces to a brick-red precipitate of copper(I) oxide, Cu₂O, when warmed with the unknown.
Containing Cu²⁺ ions, it is reduced by an aldehyde on heating to give a brick-red precipitate of copper(I) oxide, Cu₂O; a ketone gives no change.
Contains copper(II) ions held in alkaline solution and is deep blue.
Topics that use Fehling's solution
- Aldehydes and ketones (A-level only) (AQA A-Level)
- Carbonyl compounds (OCR A-Level)
Related terms
- contrast with ketones
- Oxidation of aldehydes
- reduction with NaBH₄
- Tollens' reagent
- 2,4-dinitrophenylhydrazine test
- 2,4-dinitrophenylhydrazone
- achiral exceptions
- Acidified dichromate(VI) as oxidising agent
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