Vim li cas acetone tsis hloov pauv ntau dua li cawv?
Vim li cas acetone tsis hloov pauv ntau dua li cawv?

Video: Vim li cas acetone tsis hloov pauv ntau dua li cawv?

Video: Vim li cas acetone tsis hloov pauv ntau dua li cawv?
Video: 7 txoj kev khwv nyiaj, yuav tau paub los mus hloov yus lub neej 2024, Kaum ib hlis
Anonim

Piav qhia: Acetone ua ketone tsis muaj directO-H bonds, li no tsis muaj hydrogen bondigs. Yog li ntawd, ntau stroger lub cev daim ntawv cog lus yuav tsum raug rhuav tshem hauv ethanol , tshaj hauv acetone . Vim li no, acetone evaporates sai dua tshaj ethanol txawm tias muaj qhov nro saum npoo.

Kuj nug, yog vim li cas acetone thiaj li volatile?

Acetone yog ntau dua tsis hloov pauv tshaj dej, thiab nws boils ntawm qhov kub qis dua (56 ° C) dua li dej. Nyob rau hauv dej, intermolecular hydrogen bonding tshwm sim vim muaj cov polar O-H daim ntawv cog lus hauv H2O molecule. Yog li , acetone yog ntau ntau tsis hloov pauv dua dej.

acetone puas yog cawv? Acetone thiab Cawv Cawv yog ib qho organic compound uas yog polar, zoo li acetone . Nws muaj cov pa oxygen sib txuas rau hydrogen raws li nws qhov tshwj xeeb. Thaum twg acetone yog mix nrog ib cawv , nws tuaj yeem tsim cov hemiacetal (tej zaum spelled'hemiketal').

Ua kom pom qhov no, uas evaporates sai dua cawv lossis acetone?

Acetone tsis koom nrog hydrogen bonding, yog li nws cov rog intermolecular yog piv tsis muaj zog, thiab nws evaporates sai tshaj plaws. Isopropyl cawv tuaj yeem koom nrog hauv hydrogen bonding, tab sis tsis ua tiav zoo li dej vim nws muaj thaj tsam tsis muaj polar, yog li nws evaporates ntawm tus nqi nruab nrab.

Vim li cas cawv tsis muaj zog?

Tsawg hydrogen bonding yuav tsum nyob nruab nrab ntawm molecules ntawm a tsis hloov pauv kua piv nrog rau lwm yam tsawg tsis hloov pauv kua. Lub hydrogen atom ntawm pawg hydroxyl (OH) nyob rau hauv ethanolincreases lub peev xwm rau hydrogen bonding ntawm cov neeg zej zog molecules. Piv rau methoxymethane, ethanol tsis ze li tsis hloov pauv.

Pom zoo: