2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Cov kuab tshuaj tsis muaj polar yog cov khoom sib xyaw uas muaj qhov tsis zoo ntawm cov dielecrtic thiab tsis sib xyaw nrog dej . Piv txwv xws li benzene (C6H6), carbon tetrachloride (CCl4), thiab diethyl ether (CH3CH2OCH2CH3). Table 1 nthuav qhia cov npe ntawm cov kuab tshuaj uas nquag siv hauv tshuaj lom neeg.
Lub ntsiab lus ntawm cov kuab tshuaj tsis muaj polar yog dab tsi?
Non-polar solvents yog kua lossis cov kuab tshuaj uas tsis muaj lub sijhawm dipole. Raws li qhov tshwm sim ntawm qhov no, cov kuab tshuaj tsis muaj ib feem zoo lossis tsis zoo. Yeej, lawv muaj qhov sib txawv me me hauv electronegativity. Peb kuj tuaj yeem hais tias cov ntawv cog lus ntawm atoms tuaj nrog cov electronegativities zoo sib xws.
Dab tsi yog polar thiab nonpolar hnyav?
Polar cov kuab tshuaj muaj lub sijhawm loj dipole (aka "cov nqi ib nrab"); lawv muaj kev sib txuas ntawm cov atoms nrog cov electronegativities sib txawv, xws li oxygen thiab hydrogen. Cov kuab tshuaj tsis muaj polar muaj cov ntawv cog lus ntawm cov atoms nrog cov electronegativities zoo sib xws, xws li carbon thiab hydrogen (xav tias hydrocarbons, xws li roj av).
dab tsi yog polar thiab tsis polar?
Polar molecules tshwm sim thaum muaj qhov sib txawv electronegativity ntawm cov atoms sib txuas. Nonpolar molecules tshwm sim thaum electrons sib npaug ntawm atoms ntawm diatomic moleculelos yog thaum polar bonds hauv ib lub molecule loj dua tso tseg.
yog dab tsipolar solvents?
Polar cov kuab tshuaj muaj muaj zog dielectric tas li. Lawv muaj ib los yog ntau dua electronegative atoms zoo li N lossis O. Cov pab pawg ua haujlwm muaj nyob hauv cov kuab tshuaj polar muaj xws li cawv, ketones, carboxylic acids thiab amides. Lub polarity ntawm cov kuab tshuaj nce nrog nce dielectric tas li.
Pom zoo:
Puas yog cov kuab tshuaj tsis hloov pauv ua kom lub vapor siab?
A nonvolatile solute tsis vaporize txhua. Li no, nws tsis ua rau lub vapor siab tshaj qhov kev daws teeb meem, thiab peb tuaj yeem tsom mus rau cov txiaj ntsig ntawm cov kuab tshuaj yaj hauv cov tshuaj ntawm qhov vapor siab. Yuav ua li cas thiaj tsis cuam tshuam rau vapor siab?
Puas yog cov dab dab dab dab dab dab dab dab dab dab dab dab?
Myth: Ib tug dab tshos tsis yog neeg ncaj ncees yog tiasnws haum yog. Fact: Tu siab, qhov no yog ib lo lus tsis tseeb uas tau raug perpetuated los ntawm aversive trainers. Txawm hais tias haum rau lub caj dab kom zoo khawb rau hauv cov tawv nqaij rhiab nyob ib ncig ntawm lub caj dab, uas ua rau muaj kev puas tsuaj loj rau cov thyroid, esophagus, thiab trachea.
Cov piv txwv ntawm cov kuab tshuaj thiab cov kuab tshuaj yog dab tsi?
Solutes yog cov khoom uas yaj rau hauv cov kuab tshuaj thiab peb xaus nrog kev daws. Qee qhov piv txwv ntawm cov kuab tshuaj yog dej, ethanol, toluene, chloroform, acetone, mis nyuj, thiab lwm yam. Piv txwv ntawm cov kuab tshuaj muaj xws li, qab zib, ntsev, oxygen, thiab lwm yam … Cov dej dej muaj dej (kua kua) thiab yaj oxygen (solute).
Puas muaj cov kuab tshuaj ntau dua li cov kuab tshuaj?
Ib tshuaj yog ib homogeneous sib tov ntawm ob los yog ntau tshaj tshuaj. Cov khoom uas muaj nyob rau hauv qhov loj tshaj plaws yog hu ua cov kuab tshuaj thiab ib qho tam sim no nyob rau hauv lub me me yog hu ua ib tug solute. Tsuas muaj ib qho kuab tshuaj xwb, tab sis muaj peev xwm ua tau ntau yam.
Cov tshuaj twg yog cov tshuaj uas tsis yog tshuaj tiv thaiv inflammatory analgesic?
Txhua yam koj yuav tsum paub txog NSAIDs. Nonsteroidal anti-inflammatory tshuaj (NSAIDs) yog cov tshuaj uas txo qis lossis txo qhov mob. Cov piv txwv nrov tshaj plaws ntawm cov tshuaj hauv pawg no yog aspirin thiab ibuprofen. NSAIDs tuaj nyob rau hauv lub ntsiab lus dav ntawm non-opioid analgesics.