Let us write down the reaction equations for the aldehyde:
С3Н7ОН + CuO = C3H6O + Cu + H2O – oxidation of propanol, obtained propionic aldehyde (propanal);
Н3С – СН2 – СНО + Н2 = Н3С – СН2 – СН2 – ОН – hydrogenation, propanol was formed;
Н3С – СН2 – СНО + Ag2O = H3C – CH2 – COOH + 2Ag – propanal oxidation. Propionic acid is released, this reaction is qualitative and serves to detect aldehydes (silver mirror reaction);
Н3С – СН2 – СНО + 2Cu (OH) 2 = H3C – CH2 – COOH + Cu2O + 2H2O – a qualitative reaction, oxidation of propanal with copper hydroxide occurs, the reaction occurs when heated, propionic acid is formed.
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