Cov txheej txheem:
Video: Dab tsi yog kev daws teeb meem hauv science ks3?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
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, nws raug nug, dab tsi yog kev daws teeb meem hauv kev tshawb fawb?
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 sab saum toj no, dab tsi tshwm sim rau qab zib hauv khob tshuaj yej BBC Bitesize? Los ntawm kev tawg qab zib rau hauv khob tshuaj yej , Jon qhia tau tias cov kev daws teeb meem tuaj yeem ua kom txaus. Thaum ib tag hmo khob yog ces txias cia, ib co ntawm cov qab zib recrystallises, ua kom pom tias cov solubility ntawm cov khoom feem ntau nce nrog qhov kub thiab txias.
Xav txog qhov no, dab tsi yog qhov sib xyaw hauv science ks3?
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. A sib tov ntawm cov ntaub ntawv hlau thiab cov hmoov sulfur tuaj yeem sib cais yooj yim siv cov hlau nplaum.
10 piv txwv ntawm kev daws yog dab tsi?
Piv txwv ntawm cov kev daws teeb meem hauv tsev yuav suav nrog cov hauv qab no:
- kas fes los yog tshuaj yej.
- qab zib tshuaj yej los yog kas fes (qab zib ntxiv rau kev daws)
- tej kua txiv.
- dej ntsev.
- bleach (sodium hypochlorite yaj hauv dej)
- dej qab zib (xws li xab npum yaj hauv dej)
- carbonated dej haus (carbon dioxide yaj nyob rau hauv dej yog dab tsi muab sodas lawv fizz)
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 yog kev daws teeb meem hauv chemistry BBC Bitesize?
Ib qho kev daws teeb meem yog tsim thaum lub ntsiab lus, feem ntau yog cov khoom sib xyaw ua ke, yog yaj rau hauv cov kua hu ua hnyav, feem ntau yog dej
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)