Nws melts ntawm 80 ° C, boils ntawm 218 ° C, thiab sublimes thaum cua sov. Nws yog insoluble hauv dej, me ntsis soluble hauv ethanol, soluble hauv benzene, thiab soluble heev hauv ether, chloroform, lossis carbon disulfide. Naphthalene yog tau los ntawm thee tar, ib tug byproduct ntawm lub coking ntawm thee.
Vim li cas naphthalene insoluble hauv ethanol?
Naphthalene yog ib qho tsis muaj polar compound. Yog li, nws yog insoluble hauv cov kuab tshuaj polar heev zoo li dej.
Puas naphthalene yooj yim yaj hauv cawv?
Ib qho dawb, waxy khoom, naphthalene yog soluble hauv ether thiab cawv kubthiab yog volatile heev.
Dab tsi ua rau ib yam dab tsi ntau soluble hauv ethanol?
Qhov no yog vim ua ke lub zog ntawm ntau cov hydrogen bonds tsim ntawm oxygen atoms ntawm ib qhocawv molecule thiab hydroxy H atoms ntawm lwm tus. Qhov ntev ntawm cov saw hlau carbon nyob rau hauv ib qho cawv yog, qhov solubility nyob rau hauv polar solvents thiab siab dua cov solubility nyob rau hauv nonpolar solvents.
Puas ethanol yog cov kuab tshuaj zoo rau recrystallization ntawm naphthalene?
Naphthalene yog highly nonpolarthiab yog li ntawd yuav tsis yaj hauv dej, ethanol, lossis lwm yam polar solvents.
