The chain of transformations Starch-Ethyl alcohol-Ethyl formate-Formic acid-Silver

| September 30, 2021 | education

Let’s write down the solution of the transformation chain for organic substances:
(С6Н10О5) n + nH2O = nC6H12O6 – starch hydrolysis reaction, glucose is released;
С6Н12О6 = 2С2Н5ОН + 2СО2 – fermentation occurs with the participation of yeast, carbon dioxide is formed;
С2Н5ОН + НСООН = НСОО – С2Н5 + Н2О – esterification, ethyl formate was obtained, the reaction proceeds when heated in the presence of sulfuric acid, which adds water;
НСОО – С2Н5 + Н2О = НСООН + С2Н5ОН – hydrolysis, ethanol and formic acid are formed;
С2Н5ОН + CuO = CH3COH + Cu + H2O – oxidation of ethanol, ethanal was released;
СН3СОН + Ag2O = CH3COOH + 2Ag – qualitative reaction for aldehyde, silver mirror reaction, obtained silver and acetic acid.
These reactions show the relationship between carbohydrates and oxygen-containing organic substances, as well as the relationship between organic and inorganic compounds.



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