Video: Dab tsi yog kev daws teeb meem hauv chemistry BBC Bitesize?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
A daws yog tsim thaum ib tug solute, feem ntau yog ib tug soluble khoom compound, yog yaj mus rau hauv ib tug kua hu ua ib tug hnyav, feem ntau yog dej.
Xav txog qhov no, qhov kev daws teeb meem BBC Bitesize yog dab tsi?
Ib tug solute yog cov khoom uas dissolves ua ib daws . Hauv ntsev daws , ntsev yog cov kua. Cov kuab tshuaj yog cov tshuaj uas ua rau cov kuab tshuaj - nws dissolves lub solute. Hauv ntsev daws , dej yog qhov hnyav. Thaum tsis muaj cov ntsiab lus ntxiv yuav yaj, peb hais tias daws yog saturated daws.
Ib yam li ntawd, kev daws teeb meem hauv science yog dab tsi? A daws yog homogeneous hom sib tov ntawm ob los yog ntau tshaj tshuaj. A daws Nws muaj ob ntu: ib qho kuab tshuaj thiab cov kuab tshuaj. Solute yog cov khoom uas yaj, thiab cov kuab tshuaj yog feem ntau ntawm cov daws . Kev daws teeb meem tuaj yeem muaj nyob hauv ntau theem - khoom, kua, thiab roj.
Ib yam li ntawd, tib neeg nug, dab tsi yog qhov kev daws teeb meem GCSE chemistry?
Elements, Compounds and Mixtures Ib qho khoom los yog roj yaj hauv cov kua yog hu ua a daws . Ib qho sib tov ntawm ob lub miscible kua kuj hu ua a daws . Cov tshuaj yaj hu ua solute. Cov kua uas siv rau kev sib cais yog hu ua cov kuab tshuaj.
Dab tsi yog qhov sib xyaw hauv chemistry BBC Bitesize?
Cov khoom xyaw . A sib tov muaj cov khoom sib txawv uas tsis muaj tshuaj lom neeg sib koom ua ke. Piv txwv li, ib pob khoom qab zib tuaj yeem muaj a sib tov ntawm cov khoom qab zib sib txawv. Cov khoom qab zib tsis tau sib koom ua ke, yog li lawv tuaj yeem khaws tau thiab muab tso rau hauv nyias pawg.
Pom zoo:
Cov txheej txheem ntawm kev tsim cov kev daws teeb meem yog dab tsi?
Kev daws yog tsim thaum ib yam khoom hu ua thesolute 'dissolves' rau hauv lwm yam khoom hu ua hnyav.Dissolving yog thaum lub solute tawg los ntawm ib tug loj siv lead ua ntawm molecules mus rau ntau me me los yog ib tug molecules. Lawv ua qhov no los ntawm rub tawm cov ions thiab tom qab ntawd ncig cov ntsev molecules
Dab tsi xim yog phenol liab nyob rau hauv ib qho kev daws teeb meem?
Phenol liab yog cov kua qaub-puag qhia. Nws yog tsim los ntawm condensing ob moles ntawm phenol nrog ib tug mole ntawm o-sulfobenzoic acid anhydride. Phenol Liab yog siv los ua pH qhia hauv daim ntawv thov kab lis kev cai ntawm tes. Kev daws ntawm phenol liab yuav muaj xim daj ntawm pH ntawm 6.4 lossis qis dua thiab xim liab ntawm pH
Dab tsi yog qhov sib xyaw ua ke uas tsim cov hydrogen ions hauv kev daws teeb meem?
Kua qaub. compound uas tsim hydrogen ions hauv kev daws. puag. compound uas tsim hydroxide ions hauv kev daws. tsis pub
Ib qho kev daws teeb meem hauv lej yog dab tsi?
Published on Nov 9, 2014. Koj yuav tau txiav txim siab tias ib qho kev sib npaug muaj ib qho kev daws teeb meem (uas yog thaum ib qho sib npaug sib npaug rau ib tus lej), lossis yog tias nws tsis muaj kev daws teeb meem (ob tog ntawm qhov sib npaug tsis sib npaug) los yog infinite kev daws teeb meem (ob sab ntawm qhov sib npaug yog zoo tib yam)
Dab tsi yog cov kauj ruam hauv kev daws teeb meem acid puag?
Tsis pub. Yog hais tias koj tsuas muaj ib tug qaug zog acid. Txiav txim siab qhov concentration ntawm cov kua qaub (piv txwv tias tsis muaj dissociation). Saib los yog txiav txim siab Ka. Yog hais tias koj muaj ib tug qaug zog acid thiab lub conjugate puag. daws rau qhov tsis. Yog tias koj tsuas muaj lub hauv paus conjugate. Kev daws rau pH ntawm lub hauv paus siv Kb thiab qhov sib npaug hydrolysis