Puas yog recrystallized acetanilide ntshiab?
Puas yog recrystallized acetanilide ntshiab?

Video: Puas yog recrystallized acetanilide ntshiab?

Video: Puas yog recrystallized acetanilide ntshiab?
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Anonim

Cov kev huv ntawm lub crude thiab recrystallized acetanilide yuav raug soj ntsuam los ntawm melting point. Nco qab tias cov khoom sib xyaw ua ke kwv yees tias impurities txo qis melting / khov cov ntsiab lus thiab nce cov ntsiab lus kub. Crude acetanilide tshuaj zoo li nplej xim av, thaum ntshiab acetanilide tsim ci iab crystals hauv dej txias.

Yog li ntawd, cov kuab tshuaj dab tsi yuav acetanilide recrystallized los ntawm?

Acetanilide yog yooj yim soluble nyob rau hauv ethanol ntawm chav tsev kub. Yog li peb tsis tuaj yeem siv cov ethanol ua ib qho hnyav rau acetanilide recrystallization. Tab sis nws tuaj yeem soluble hauv dej thaum cua sov. Yog li ntawd, dej yog qhov sib tw hnyav rau acetanilide.

Dab tsi yog qhov melting point ntawm impure acetanilide? Cov melting point ntawm impure acetanilide yog 113 ºC thiab cov ntshiab acetanilide melting point yog 115 ºC.

Kuj paub yog, lub hom phiaj ntawm recrystallization ntawm acetanilide yog dab tsi?

Recrystalization yog cov txheej txheem purification; nws tso cai rau peb tshem tawm impurities hauv ib qho qauv. Lub tswv yim yog koj tso cov khoom tsis huv hauv cov kua xws li dej lossis ethanol. Tom qab cua sov me ntsis, cov khoom yuav yaj hauv cov kua (tseem hu ua cov kuab tshuaj).

Vim li cas dej yog qhov zoo tshaj plaws recrystallization hnyav ntawm ntshiab Acetanilide?

Nws yog qhov tseem ceeb tshaj plaws thaum cov khoom siv lead ua tau lim tawm ntawm cov khoom xav tau. Yog vim li cas dej ib zoo kuab tshuaj rau cov recrystallization ntawm acetanilide tshuaj ? Acetanilide yooj yim dissolves nyob rau hauv kub dej , tab sis yog insoluble ntawm tsawg temps. Yog li ntawd, nws dissolves nyob rau hauv kub dej tab sis crystalizes yooj yim thaum txias.

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