NiCKEL Posted January 20, 2016 Report Share Posted January 20, 2016 I know this isn't really part of the curriculum but where does the oxygen come from when an aldehyde turns into a carboxylic acid in the oxidation of a primary alcohol? Reply Link to post Share on other sites More sharing options...
kw0573 Posted January 20, 2016 Report Share Posted January 20, 2016 The oxygen comes from the oxidizing agent, typically permanganate or dichromate ions. I would consider that part of syllabus The mechanism is not required permanganate becomes MnO2 (neutral) and dichromate becomes, to my best knowledge, Cr3+. You can of course balance the equations using redox. Reply Link to post Share on other sites More sharing options...
Msj Chem Posted January 20, 2016 Report Share Posted January 20, 2016 Yes, the oxidizing agent is traditionally acidified potassium dichromate(VI) (H+ / Cr2O72-)The half equation is: 6e- + 14H+ + Cr2O72- ==> 2Cr3+ + 7H2O Reply Link to post Share on other sites More sharing options...
NiCKEL Posted January 22, 2016 Author Report Share Posted January 22, 2016 Oh shoot ok our teacher just said "and don't worry about it but an oxygen comes along" lol ok thanks Reply Link to post Share on other sites More sharing options...
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