Video: Cosolvent yog dab tsi thiab piv txwv?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cosolvents uas feem ntau siv yog methanol, ethanol thiab dej. Cosolvents ua hauj lwm zoo tshaj plaws nyob rau hauv lub xub ntiag ntawm lwm tus kuab tshuaj uas, ua ke, txhim khu lub dissolution ntawm ib tug solute.
Cov lus nug tseem yog, qhov hnyav thiab piv txwv yog dab tsi?
Solvent yog, hauv cov ntsiab lus yooj yim tshaj plaws, ib yam dab tsi uas koj yaj lwm cov tshuaj (tseem hu ua solute) thiab qhov sib xyaw no yuav ua rau peb paub tias yog 'kev daws teeb meem'. Ib txhia piv txwv ntawm cov kuab tshuaj yog dej, ethanol, toluene, chloroform, acetone, mis nyuj, thiab lwm yam. Piv txwv ntawm solutes muaj xws li qab zib, ntsev, oxygen, thiab lwm yam.
Tsis tas li ntawd, Cosolvent nce solubility li cas? Tsis muaj zog electrolytes thiab nonpolar molecules feem ntau muaj dej tsis zoo solubility . Cov txheej txheem no hu ua cosolvency, thiab cov kuab tshuaj siv los nce solubility npe hu ua cosolvent . Cosolvent Lub kaw lus ua haujlwm los ntawm kev txo qis qhov cuam tshuam ntawm kev sib tshuam ntawm cov kua dej aqueous thiab hydrophobic solute.
Tib neeg kuj nug, co solvency yog dab tsi?
Lub sij hawm co -solvent feem ntau yog xa mus rau cov dej miscible organic kua uas ua rau kom cov solubility ntawm cov tsis muaj polar tebchaw yog ntxiv rau cov dej hauv dej.
Dab tsi yog hom kuab tshuaj?
Muaj 3 hom kuab tshuaj Feem ntau ntsib: nonpolar, polar aprotic, thiab polar protic. (Tsis muaj ib yam dab tsi uas tsis yog-polar protic kuab tshuaj ).
Pom zoo:
Yam ua piv txwv piv txwv li cas?
Ib khub xaj yog ib khub ntawm tus lej hauv ib qho kev txiav txim. Piv txwv li, (1, 2) thiab (- 4, 12) raug txiav ua khub. Qhov kev txiav txim ntawm ob tus lej tseem ceeb: (1, 2) tsis sib npaug rau (2, 1) -- (1, 2) ≠ (2, 1)
Dab tsi yog qhov sib piv thiab piv txwv?
Inverse proportion. Inverse proportions tshwm sim thaum ib tus nqi nce thiab qhov txo qis. Piv txwv li, ntau tus neeg ua haujlwm ntawm txoj haujlwm yuav txo lub sijhawm los ua kom tiav cov haujlwm. Lawv yog inversely proportional
Dab tsi yog txhais los ntawm lub sij hawm dissociation thiab dab tsi yog ib qho piv txwv ntawm cov khoom uas dissociates?
Dissociation, nyob rau hauv chemistry, sib cais ntawm ib yam khoom mus rau hauv atoms los yog ions. Thermal dissociation tshwm sim ntawm qhov kub thiab txias. Piv txwv li, hydrogen molecules (H 2) dissociate rau hauv atoms (H) ntawm kub heev; ntawm 5,000 ° K txog 95% ntawm cov molecules hauv cov qauv ntawm hydrogen yog dissociated rau hauv atoms
Dab tsi yog qhov txawv ntawm instantaneous thiab nruab nrab ceev dab tsi yog qhov piv txwv loj tshaj ntawm kev ceev ceev?
Qhov nruab nrab ceev yog qhov ceev nruab nrab ntawm lub sijhawm. Instantaneous ceev yuav yog qhov ceev txhua qhov muab tam sim ntawd hauv lub sijhawm ntawd, ntsuas nrog lub ntsuas ntsuas lub sijhawm
Dab tsi yog qhov txawv ntawm microevolution thiab macroevolution Dab tsi yog qee qhov piv txwv ntawm txhua tus?
Microevolution vs. Macroevolution. Piv txwv ntawm cov kev hloov microevolutionary no yuav suav nrog kev hloov ntawm hom xim lossis loj. Macroevolution, piv txwv li, yog siv los hais txog kev hloov pauv ntawm cov kab mob uas tseem ceeb txaus uas, dhau sijhawm, cov kab mob tshiab yuav raug suav tias yog hom tshiab nkaus xwb