Carbonyls and Carboxylic Acids (OCR A-Level Chemistry A): Flashcards
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Functional group in aldehydes and ketones
Functional group in aldehydes and ketones
Carbonyl group (C=O)
Reagent that detects any carbonyl group
Reagent that detects any carbonyl group
2,4-dinitrophenylhydrazine (2,4-DNP)
Reagent that specifically identifies aldehydes
Reagent that specifically identifies aldehydes
Tollens' reagent
Colour of Brady's reagent solution
Colour of Brady's reagent solution
Pale orange
Positive result for 2,4-DNP test
Positive result for 2,4-DNP test
Yellow or orange precipitate
Type of reaction between 2,4-DNP and carbonyls
Type of reaction between 2,4-DNP and carbonyls
Condensation reaction (water eliminated)
Positive Tollens' test result for aldehydes
Positive Tollens' test result for aldehydes
Silver mirror forms
Result when ketones react with Tollens' reagent
Result when ketones react with Tollens' reagent
No reaction occurs
Product when aldehydes oxidised in Tollens' test
Product when aldehydes oxidised in Tollens' test
Carboxylic acids
How to identify specific carbonyl using 2,4-DNP derivative
How to identify specific carbonyl using 2,4-DNP derivative
Measure melting point and compare to data table