Kev piav qhia: Cov kuab tshuaj siv rau recrystallization qhov zoo tshaj plaws muab cov dej tsis zoo hauv cov kuab tshuaj txias, tab sis zoo rau middling solubility hauv cov kuab tshuaj kub. … Acetone nyiam ua cov kuab tshuaj zoo ntawm txhua qhov kub; cov khoom yuav nce mus rau hauv nws, thiab tsis kam ua crystallize.
Vim li cas acetone tsis yog cov kuab tshuaj recrystallization zoo?
Cov kuab tshuaj nrog cov ntsiab lus kub qis heev (piv txwv li diethyl ether, acetone, thiab cov roj av qis qis) yog flammablethiab tuaj yeem ua haujlwm nyuaj nrog lawv yooj yim evaporate. … Yog hais tias ib tug compound feem ntau tsis muaj polar, nws tej zaum yuav crystallized los ntawm roj av ether los yog hexanes, los yog tej zaum yuav xav tau ib tug tov hnyav.
Vim li cas acetone thiaj li muaj kuab tshuaj zoo?
Acetone yog cov kuab tshuaj zoo vim nws muaj peev xwm ua kom yaj cov polar thiab nonpolar, thaum lwm cov kuab tshuaj tsuas yog yaj ib los yog lwm yam. … Thib ob, acetone yog cov kuab tshuaj zoo vim nws yog cov khoom siv miscible, txhais tau tias nws muaj peev xwm sib tov nrog dej hauv txhua qhov sib npaug.
Dab tsi ua rau cov kuab tshuaj zoo tagnrho rau siv hauv recrystallization?
Cov yam ntxwv ntawm qhov zoo Recrystallization Solvent: Cov kuab tshuaj recrystallization yuav tsum tsis txhob yaj cov tshuaj kom huv hauv chav sov, tab sis nws yuav tsum yaj nws zoo ntawm qhov hnyav qhov kub kub taw tes 2. Cov hnyav yuav tsum dissolve soluble impurities zoo nyob rau hauv chav tsev kub.
Puas yog dej ua cov kuab tshuaj recrystallization zoo?
Rau feem ntau cov organic tebchaw, dej tsis yog cov kuab tshuaj zoo recrystallization. Recrystallization yuav tsum tau ua siab ntev tseem ceeb yog li npaj siab ua siab ntev. Yog tias koj saib cov khoom hauv cov tshuaj tseem, siv lub nqus nqus lim tshem tawm (kub nqus nqus pom).
