Are the substances shown in italics undergoing oxidation or reduction?

(c) Wine (containing ethanol, CH₃CH₂OH) sours to vinegar (CH₃COOH).

Video transcript

Welcome back, everyone determine whether the compound written in italic undergoes oxidation or reduction in a lab benzyl hde is converted to benzo acid. And we're interested in benzyl Hyde. We can draw its structure specifically, we're going to have penny substituent bonded to cho, right. So basically, that's an aldehyde, carbon oxygen double bond and carbon hydrogen single bond. And this structure is converted into benzo acid. Ph which is C six H five. That's phenyl coo h. Now, what can we notice? Well, basically, we are replacing hydrogen with hydroxy part, right? And essentially we are decreasing the number of carbon hydrogen bonds and simultaneously we are increasing the carbon hetero atom bonds. And in this case, the hetero atom is oxygen and this process is called oxidation. While reduction is basically the opposite process. Whenever we decrease the carbon hydrogen bonds or increase the carbon oxygen bonds, we simply define this process as oxidation. Any of those is sufficient. But in this problem, we had them both. Thank you for watching.