Why is Brady's test negative(DNPH gives no PPT)for carboxylic acids?
Although an orange ppt is formed with aldehydes and ketones?
Hi,
this thread explains it quite well. Look at the top answer.
http://chemistry.stackexchange.com/questions/18481/why-doesnt-the-bradys-test-2-4-dnph-work-on-carboxylic-acids
this thread explains it quite well. Look at the top answer.
http://chemistry.stackexchange.com/questions/18481/why-doesnt-the-bradys-test-2-4-dnph-work-on-carboxylic-acids
Original post by sophiebookley
Hi,
this thread explains it quite well. Look at the top answer.
http://chemistry.stackexchange.com/questions/18481/why-doesnt-the-bradys-test-2-4-dnph-work-on-carboxylic-acids
this thread explains it quite well. Look at the top answer.
http://chemistry.stackexchange.com/questions/18481/why-doesnt-the-bradys-test-2-4-dnph-work-on-carboxylic-acids
I'm not sure about all exam boards, but I do OCR A and we don't. In fact, I don't think we even have to know why 2,4 DNPH produces a precipitate with aldehydes/ketones versus carboxylic acids. We just have to know a basic version of the test for a C=O in aldehydes and ketones and a bit about 2,4 DNPH itself (it's full systematic name, precipitate colour etc). But, like I said, I'm not sure about other exam boards. Maybe check the specification or ask a teacher?
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