Write the reaction equations: ethylene-ethanol-acetadehyde-acetic acid.

Let’s make a chain of transformations:
C2H4 – C2H5 – OH – CH3 – SON – CH3 – COOH.
Let’s implement the solution:
Н2С = СН2 + Н2О = Н3С – СН2 – ОН – the reaction of ethylene hydration, feasible in water vapor, a copper catalyst is used, ethanol is released;
Н3С – СН2 – ОН + CuO = H3C – COH + Cu + H2O – a qualitative reaction to ethanol, occurs upon heating, ethanal and free copper are released;
Н3С0СОН + Ag2O = CH3 – COOH + 2Ag – a qualitative reaction to aldehyde, possible with the participation of silver oxide and ammonia solution, acetic acid and silver are formed.
Qualitative reactions are used to detect alcohols and aldehydes even in small quantities.