Yuav ua li cas urea pib tsim nyob rau hauv lub lab?
Yuav ua li cas urea pib tsim nyob rau hauv lub lab?

Video: Yuav ua li cas urea pib tsim nyob rau hauv lub lab?

Video: Yuav ua li cas urea pib tsim nyob rau hauv lub lab?
Video: 4.1 Английская грамматика-Артикулы-a, an, the 2024, Kaum ib hlis
Anonim

Friedrich Wohler tau pom nyob rau xyoo 1828 ntawd urea tuaj yeem yog ua los ntawm cov khoom pib inorganic. Cov txheej txheem no hu ua urea lub voj voog, uas tshem tawm cov khib nyiab nitrogen. Lub siab tsim nws los ntawm kev sib txuas ob lub ammonia molecules nrog carbon dioxide molecule.

Ib yam li ib tug yuav nug, urea npaj li cas hauv chav kuaj?

Urea yog tam sim no npaj ua lag luam nyob rau hauv ntau ntau ntawm kua ammonia thiab kua carbon dioxide. Ob cov ntaub ntawv no tau ua ke nyob rau hauv kev kub ntxhov siab thiab siab kub los ua ammonium carbamate, uas tom qab ntawd decomposes ntawm ntau qhov qis dua kom tawm los. urea thiab dej.

Ib yam li ntawd, Wohler tau tsim cov urea li cas? Hauv qhov kev sim no, Wohler yog sim ua kom ammonia cyanate, tab sis thaum ammonia cyanate tsim nyob rau hauv cov mob no nws decomposed thiab ces tsim. urea . Muaj peb kauj ruam nyob rau hauv cov tshuaj tiv thaiv: ntsev rearrangement, tsim ammonium cyanate. Ammonium decomposes tsim ammonia thiab cyanic acid.

Ntxiv mus, leej twg ua urea hauv lab?

Urea yog thawj zaug cais tawm ntawm cov zis nyob rau hauv 1773 los ntawm Fabkis chemist Hilaire-Marin Rouelle. Nws npaj los ntawm German chemist Friedrich Wöhler los ntawm ammonium cyanate nyob rau hauv 1828 yog thawj feem ntau txais kev kuaj sim synthesis ntawm ib txwm tshwm sim organic compound los ntawm inorganic cov ntaub ntawv.

Yuav ua li cas urea tsim rau Def?

Chemistry. DEF yog 32.5% daws ntawm urea , (NH. 2) 2CO. Thaum nws raug txhaj rau hauv cov pa roj cua kub, cov dej evaporates thiab cov urea thermally decomposes rau daim ntawv ammonia (NH.

Pom zoo: