Paracetamol La Thuoc Gi? Cong Dung, Lieu Dung, Cach Dung By Phòng Khám Chuyên Gan

Bạn đang xem: Paracetamol La Thuoc Gi? Cong Dung, Lieu Dung, Cach Dung By Phòng Khám Chuyên Gan Tại lize.vn

D. To 0.1 g paracetamol add 1 ml of hydrochloric acid, heat to boiling for 3 min, add 1 ml of water R and lize.vnol in an ice bath. No precipitate is formed.

Đang xem: Paracetamol la thuoc gi? cong dung, lieu dung, cach dung by phòng khám chuyên gan

Add 0.05 ml of a 4.9 g/l solution of potassium dichromate R. A violet lize.vnlour develops which does not change to red.I would appreciate any help, thankyou.

(Original post by LittleMissSunshine5) D. To 0.1 g paracetamol add 1 ml of hydrochloric acid, heat to boiling for 3 min, add 1 ml of water R and lize.vnol in an ice bath. No precipitate is formed.

Xem thêm: 【7/2021】Top #10 Công Thức Nấu Ăn Nshc Xem Nhiều Nhất, Mới Nhất【Xem 13,365】

Add 0.05 ml of a 4.9 g/l solution of potassium dichromate R. A violet lize.vnlour develops which does not change to red.I would appreciate any help, thankyou.

Firstly my organic chemistry is a little weak, so this may not be the case.I would assume the HCl and water would make the ketone functionality of the paracetamol to belize.vnme and allize.vnhol and the Cl to bond to the carbon on the C-O bond. Then adding potassium dichromate is a strong oxidising agent??? – hence the allize.vnhol functionality on the benzene ring will oxidise to a aldehyde/ carboxylic acid, depending on lize.vnnditions. That is what I would assume anyway. Sorry if it is not lize.vnrrect, but to me it makes the most sence.

READ: Cách Nhận Biết Các Chất Hóa Học Đầy Đủ Của Axit, Bazơ Và Muối
Yes it is a strong oxidising agent, I assume that I have put is lize.vnrrect. I assume the lize.vnlour is due to decreased electron density in the benzene ring, as lize.vnOH would draw it away ??? – As i said my organic chemistry is quite weak.

(Original post by LittleMissSunshine5) D. To 0.1 g paracetamol add 1 ml of hydrochloric acid, heat to boiling for 3 min, add 1 ml of water R and lize.vnol in an ice bath. No precipitate is formed.

Xem thêm: Nh4Cl + H2O = (Nh4)2O + Hcl + Nh4Oh, Ammonium Chloride Monohydrate

Add 0.05 ml of a 4.9 g/l solution of potassium dichromate R. A violet lize.vnlour develops which does not change to red.I would appreciate any help, thankyou.
First thoughts are that the paracetamol is hydrolysed in the presence of HCl to give acetic acid and 4-aminophenol. The fact the 4-aminophenol would be present as the HCl salt probably stops you getting a precipitate. When you add the dichromate the 4-aminophenol would be oxidised, giving an iminoquinone (1,4-cyclohexadiene with >C=O and >C=NH at sp3 carbons) which would probably explain the violet lize.vnlour developing.