Liquid vs Solution
Peb txhua tus paub txog cov kua uas yog piv txwv ntawm ib qho ntawm peb theem uas muaj teeb meem hauv (plasma yog theem plaub). Cov kua dej yog cov yam ntxwv ntawm lawv lub peev xwm ntws thiab lawv lub peev xwm los coj cov duab ntawm lub thawv uas lawv muab tso rau. Dej yog cov piv txwv zoo tshaj plaws ntawm cov kua thiab cov kev daws teeb meem uas yog ib pawg ntawm cov kua. Kev daws yog tsim thaum ib yam dab tsi ntxiv los yog yaj hauv cov kua. Koj ua cov tshuaj thaum koj ntxiv ntsev los yog qab zib rau ib khob dej. Koj puas paub qhov txawv ntawm cov kua thiab cov tshuaj uas zoo ib yam li koj? Cia peb kawm paub hauv kab lus no.
Raws li cov kua ua los ntawm ib yam khoom, nws tseem huv si thiab hu ua kua. Thaum ib yam dab tsi ntxiv rau nws, nws dhau los ua kev daws teeb meem. Ib qho kev daws teeb meem txhais tau tias yog homogeneous sib xyaw ntawm cov khoom uas muaj qhov sib txawv. Thaum koj ntxiv qee cov suab thaj rau hauv dej, dej yog ntau dua li cov suab thaj thiab hu ua hnyav thaum cov piam thaj uas tsawg dua yog hu ua kua. Ib qho tuaj yeem ntxiv ntau cov kuab tshuaj hauv cov tshuaj xws li koj tuaj yeem ntxiv ntsev rau tib cov kua dej thiab qab zib. Ib tus tuaj yeem tau txais kev daws teeb meem vim yog cov cuab yeej ntawm cov kuab tshuaj kom yaj hauv dej. Thaum muaj cov sib tov sib xyaw ua ke (xws li cov pob zeb uas muaj cov khoom sib xyaw tsis sib luag thoob plaws hauv qhov sib xyaw) cov kev daws teeb meem yog homogenous raws li lawv muaj cov khoom sib xws thiab cov khoom.
Muaj ntau lwm yam khoom ntawm kev daws teeb meem sib nrug los ntawm homogeneity. Cov ntsiab lus ntawm kev daws teeb meem tsis sib cais ntawm lawv tus kheej thiab dhau los ntawm cov lim dej zoo tsis hloov pauv. Yog tias koj ntxiv qee cov suab thaj rau hauv ib khob dej thiab tsis txawm do dej, qab zib maj mam yaj hauv dej nyob hauv qhov chaw khoob hauv dej. Cov txheej txheem ntawm kev sib cais ntawm cov kuab tshuaj nyob rau hauv cov kuab tshuaj yog zoo ib yam li cov txheej txheem ntawm diffusion raws li pom nyob rau hauv gases.
Muaj ntau ntau hom kev daws teeb meem thiab yog tias koj xav tias cov kev daws teeb meem muaj cov khib nyiab hauv cov kua xwb, rov xav dua. Muaj cov kev daws teeb meem ntawm cov kua sib txawv kuj ntxiv rau cov kev daws teeb meem ua los ntawm tag nrho peb, khoom, kua thiab roj. Peb paub ntau ntxiv txog cov kev daws teeb meem hauv cov kua dej thiab cov kua dej thiab cov kua dej. Tab sis huab cua yog ib qho piv txwv zoo nkauj heev ntawm kev daws cov roj cua uas nitrogen yog cov kuab tshuaj thaum lwm cov roj tseem ceeb xws li oxygen, carbon dioxide, neon, argon thiab lwm yam nyob hauv cov kab thiab dej vapor kuj sib xyaw ua ke.
Cov kev daws yog hu ua concentrated lossis dilute nyob ntawm qhov feem pua ntawm cov kua dej hauv lawv. Muaj lwm yam khoom hu ua solubility uas qhia tias muaj pes tsawg tus solute tuaj yeem yaj hauv cov kua. Koj tuaj yeem mus ntxiv ntsev lossis suab thaj rau ib khob dej tab sis muaj lub sijhawm thaum cov tshuaj tau saturated thiab ntau dua tsis tuaj yeem ntxiv rau cov tshuaj.
Qhov Sib Txawv Ntawm Cov Kua thiab Tshuaj
• Txawm hais tias ib qho kev daws ntawm cov khoom hauv cov kua lossis ob lub kua zoo ib yam li cov kua, nws muaj qhov sib txawv ntawm cov kua ntshiab thiab cov tshuaj.
• Ib qho kua yog ua los ntawm ib hom molecules whereas cov tshuaj yog tsim los ntawm ob los yog ntau hom molecules
• Cov tshuaj kuj yog ib hom kua txawm tias nws tsis yog kua ntshiab
• Cov kua ntshiab yog lub xeev ntawm cov teeb meem thaum cov tshuaj yog ib homogeneous sib tov ntawm cov tshuaj nyob rau hauv ib tug kua daim ntawv
• Tag nrho cov khoom tseem ceeb ntawm cov kua (xws li kub taw tes, melting point, vapor siab thiab lwm yam) hloov thaum nws dhau los ua cov tshuaj
