Sir ,pls show the practical for determining the rate of reaction...by plotting 2 graphs ...which are in ISC syllabus... Your videos are really helpful, sir.😊
The reaction between aniline and potassium dichromate in acidic medium gives 1,4-benzoquinone through intermediates such as 4-aminophenol and quinoneimine. Obviously Chromium will also change its oxidation state. The exact mechanism is not known. However the colour change is due to formation of various oxidation products as intermediate.
@@insightsofchemistry-withsa9009 thanks for replying. I can't get aniline here in the UK so I've had to make it. My pathway to it was to distil sodium benzoate and naoh to get benzene, redistill then do a nitration to get nitrobenzene, then add thiouria dioxide and naoh to reduce it to aniline. Unfortunately all I have is about 11ml of aniline, it's milky due to the presence of water and some yellow unreacted NB. However I can confirm that it passed this dichromate test wheras the nitrobenzene didn't. If I somehow manage to purify such a small amount, my plan will be to heat the aniline with methanol in a hydrothermal autoclave to form Dimethylaniline
Sir, please bring the 5th test for Aniline soon ! 🤩🤩 Your videos are great Sir, and very helpful as well !
5th test is uploaded... Enjoy.. 😊
@@insightsofchemistry-withsa9009 Thank you so much sir 😁
Sir ,pls show the practical for determining the rate of reaction...by plotting 2 graphs ...which are in ISC syllabus...
Your videos are really helpful, sir.😊
Is colour due to Chromium oxidation state?
The reaction between aniline and potassium dichromate in acidic medium gives 1,4-benzoquinone through intermediates such as 4-aminophenol and quinoneimine. Obviously Chromium will also change its oxidation state. The exact mechanism is not known. However the colour change is due to formation of various oxidation products as intermediate.
@@insightsofchemistry-withsa9009 thanks for replying. I can't get aniline here in the UK so I've had to make it. My pathway to it was to distil sodium benzoate and naoh to get benzene, redistill then do a nitration to get nitrobenzene, then add thiouria dioxide and naoh to reduce it to aniline. Unfortunately all I have is about 11ml of aniline, it's milky due to the presence of water and some yellow unreacted NB.
However I can confirm that it passed this dichromate test wheras the nitrobenzene didn't.
If I somehow manage to purify such a small amount, my plan will be to heat the aniline with methanol in a hydrothermal autoclave to form Dimethylaniline
Thank you sir
Best 🙏👍❤️
In our lab manual we were written that a deep red colour will be formed which would turn into black eventually...
Just do the experiment.. Whatever observation obtained, write that one.
Yes you are true, it is also given in my lab manual
Yes sir please
Uploaded