Boiling taw tes ntsuas kev tsom xam ntawm acetic acid: ntsuas kub, tsis muaj cov ntsiab lus thiab kev siv
Acetic acid (tshuaj acatula ch₃COOH), tseem muaj acetic acid, yog cov organic acid uas tau siv dav hauv cov tshuaj, khoom noj thiab khoom lag luam. Lub zog ntawm lub cev ntawm acetic acid, tshwj xeeb tshaj yog nws qhov cub npau npau, yog qhov tseem ceeb rau cov txheej txheem ntau lawm thiab cov ntawv thov hauv kev lag luam tshuaj. Hauv tsab xov xwm no, peb yuav tshawb xyuas qhov cub sov ntawm cov acetic acid nyob rau hauv kev nthuav dav, sib tham txog qhov cuam tshuam txog nws qhov tseem ceeb thiab nws qhov tseem ceeb hauv cov ntawv thov sib txawv.
Cov Txheej Txheem Txheej Txheem ntawm lub boiling taw tes ntawm acetic acid
Qhov cub npau npau ntawm acetic acid yog 117.9 ° C (244.2 ° F), uas yog ntsuas ntawm cov qauv cua ntawm cov qauv siab (1 qhov chaw, 101.3 kpa). Ntawm qhov kub no, acetic acid hloov los ntawm cov kua rau roj, cov txheej txheem uas yog ib kauj ruam tseem ceeb hauv ntau cov txheej txheem. Acetic acid muaj lub siab boil points pots piv rau lwm cov organic sib xyaw, uas yog kev lom zem ntau rau qhov muaj cov lwg me me.
Yam cuam tshuam rau lub boiling taw tes ntawm acetic acid
Txawm hais tias tus txheej txheem cua sov taw tes acetic acid yog 117.9 ° C, hauv kev xyaum qhov kub no tau cuam tshuam los ntawm ntau yam. Siab muaj cov nyhuv tseem ceeb rau ntawm boiling point. Ntawm qhov kev ntsuas qis dua (piv txwv li, lub tshuab nqus tsev), qhov npau taws ntawm acetic acid txo qis, nws lub zog kub nce. Yog li ntawd, thaum lub sijhawm muaj distillation, tswj lub siab ntawm lub system tuaj yeem tswj lub rwj thiab sib cais ua haujlwm ntawm acetic acid.
Impurities nyob rau hauv kev daws teeb meem kuj tseem muaj qhov cuam tshuam ntawm npau taws ntawm acetic acid. Tshwj xeeb tshaj yog thaum acetic acid ntawv sib tov nrog lwm cov chaw sib xyaw, nws qhov cub npau npau yuav cuam tshuam los ntawm cov txiaj ntsig txiaj ntsig. Piv txwv li, hauv cov kev daws teeb meem, qhov npau npau taw ntawm acetic acid yuav raug txo vim yog azeotropic tshwm sim. Nkag siab thiab txhawb nqa cov txheej txheem no yog qhov tseem ceeb kom ua kom zoo ua cov txheej txheem tshuaj ntau lawm.
Cov ntawv thov ntawm acetic acid boiling cov ntsiab lus hauv kev lag luam
Qhov npau taws ntawm cov acetic acid tsis yog tsuas yog ib qho tseem ceeb rau nws cov khoom siv lub cev, nws kuj tseem pheej siv nws cov ntawv thov hauv ntau cov txheej txheem muaj. Daim ntawv thov raug yog distillation thiab huv ntawm acetic acid. Hauv kev tsim cov tshuaj lom neeg, kev tswj hwm ntawm lub boiling taw tes yog ib kauj ruam tseem ceeb hauv kev tau txais siab purity acetic acid. Hauv kev tsim cov acetate thiab acetate esters, cov kev cai ntawm lub boiling taw tes ntawm acetic acid kuj muaj qhov cuam tshuam ncaj qha rau cov khoom lag luam zoo thiab cov khoom lag luam.
Qhov cub npau npau ntawm acetic acid kuj tseem muaj cov kev thov kev saib xyuas ib puag ncig thiab kho cov txheej txheem. Kev kho mob ntawm cov dej khib nyiab lossis cov roj pov acetic acid tuaj yeem ua tiav los ntawm kev sib yeem los ntawm kev sib yeem los ntawm kev sib yeem los ntawm cov acetic acid los ntawm cua sov. Yog li ntawd, mastering lub boiling taw tes ntawm acetic acid thiab nws txoj cai hloov yog qhov tseem ceeb rau kev tsim kho cov txheej txheem kho mob zoo.
Lub ntsiab
Qhov cub npau npau ntawm acetic acid yog qhov tseem ceeb ntawm lub cev parameter nrog dav tus nqi hauv kev lag luam tshuaj. To taub thiab txawj cuam tshuam cov ntsiab lus ntawm npau npau, xws li cov ntsiab lus thiab cov kws tshaj lij Txhim Kho Cov Khoom Siv Ntau Lawm thiab txhim kho cov khoom lag luam zoo. Cov kev siv ntau ntawm cov boiling taw tes ntawm acetic acid hauv kev lag luam kuj tseem tseem ceeb hauv kev tiv thaiv thiab ib puag ncig. Nyob rau hauv yav tom ntej kev tshawb fawb thiab kev siv, hauv-tob tob taw tes ntawm acetic acid yuav txuas ntxiv mus ua cov thev naus laus zis mus rau kev lag luam tshuaj.