Qhov Tseem Ceeb Qhov txawv - Qhov Tseeb vs Colloidal Solution
Cov tshuaj muaj tseeb thiab cov tshuaj colloidal yog ob hom kev daws teeb meem raws li lawv cov khoom sib txawv. Cov tshuaj muaj tseeb thiab cov tshuaj colloidal sib txawv nyob rau hauv ntau yam khoom xws li particle loj, tsos ntawm cov tshuaj, filterability, thiab visibility. Cov no feem ntau tshwm sim vim qhov sib txawv ntawm qhov sib txawv ntawm qhov loj me me. Qhov sib txawv tseem ceeb ntawm cov tshuaj muaj tseeb thiab cov tshuaj colloidal yog, qhov tseeb ntawm cov tshuaj yog homogeneous nyob rau hauv sib piv rau cov tshuaj colloidal, uas yog ib tug heterogeneous sib tov.
Kev daws qhov tseeb yog dab tsi?
Cov kev daws teeb meem tseeb yog cov kev daws teeb meem homogenous uas muaj qhov sib xyaw ntawm ob lossis ntau dua cov tshuaj yaj hauv cov kuab tshuaj. Qhov loj me me ntawm cov kuab tshuaj yog tsawg dua 10 -9 m lossis 1 nm. Ib qho piv txwv yooj yim rau kev daws qhov tseeb yog kev daws cov suab thaj hauv dej. Cov khoom hauv qhov kev daws teeb meem tiag tiag tsis pom qhov muag liab qab, thiab cov khoom tsis tuaj yeem raug lim los ntawm cov ntawv lim. Cov hais nyob rau hauv ib tug tseeb tov tsis nyob rau hauv sawv txij li thaum lawv tag nrho yaj nyob rau hauv cov tshuaj. Yog li ntawd, lawv tsis tuaj yeem sib cais los ntawm kev pom zoo tib yam.
Colloidal Solution yog dab tsi?
Colloidal cov kev daws teeb meem yog cov sib xyaw ua ke, thiab qhov loj me ntawm cov tshuaj hauv cov tshuaj yog nyob nruab nrab ntawm cov kev daws teeb meem tiag tiag thiab kev ncua. Nws txawv ntawm 1nm mus rau 1000nm. Cov pa taws tshwm sim los ntawm hluav taws yog ib qho piv txwv ntawm cov kab ke colloidal uas cov khoom me me ntawm cov khoom ntab hauv huab cua. Zoo ib yam li cov kev daws teeb meem tiag, cov khoom hauv cov tshuaj colloidal tsis tuaj yeem pom ntawm qhov muag liab qab. Tab sis, cov khoom no loj txaus los thaiv los ntawm daim ntawv parchment lossis los ntawm cov kab mob tsiaj.
Dab tsi yog qhov sib txawv ntawm Cov Tshuaj Tseeb thiab Cov Tshuaj Colloidal?
Txoj Cai ntawm Cov Tshuaj Muaj Tseeb thiab Cov Tshuaj Colloidal:
Homogeneous vs. Heterogeneous
Txoj Kev Tseeb: Cov tshuaj muaj tseeb muaj qhov sib xyaw ua ke ntawm ob lossis ntau yam tshuaj.
Colloidal Solution: Cov tshuaj colloidal zoo li cov tshuaj homogeneous, tab sis nws yog heterogeneous-mixture.
Particle Visibility:
Tshwj xeeb: Cov kuab tshuaj ntawm cov tshuaj muaj tseeb tsis tuaj yeem pom txawm tias nrog lub tshuab tsom.
Colloidal Solution: Cov khoom hauv cov tshuaj colloidal tuaj yeem pom tsuas yog nrog lub tshuab tsom iav muaj zog.
Particle Loj:
True Solution: Qhov luaj li cas ntawm cov particles nyob rau hauv ib tug tseeb tov yog hais txog 10-10 m.
Colloidal Solution: Qhov loj ntawm cov khoom solute hauv cov tshuaj colloidal yog nyob nruab nrab ntawm 1 - 100nm.
Sib cais ntawm Cov Khoom:
Txoj Kev Tseeb: Cov khoom sib xyaw hauv cov tshuaj muaj tseeb tsis tuaj yeem sib cais los ntawm kev pom.
Colloidal Solution: Cov khoom sib xyaw ntawm colloid tsis tuaj yeem sib cais los ntawm kev pom. Txawm li cas los xij, lawv tuaj yeem tsim kho los ntawm centrifuging thiab tom qab ntawd lim los ntawm cov lim tshwj xeeb.
Tyndall Effect:
Txoj Kev Tseeb: Cov kev daws teeb meem tseeb tsis qhia Tyndall nyhuv. (Tsis txhob tawg lub teeb)
Colloidal Solution: Cov tshuaj Colloidal qhia Tyndall nyhuv. (Nws tseem hu ua "Tyndall scattering", yog lub teeb tawg los ntawm cov khoom hauv ib qho colloid lossis lwm cov khoom hauv qhov kev ncua zoo heev)
Piv txwv ntawm Cov Tshuaj Muaj Tseeb thiab Cov Tshuaj Colloidal:
Tshuaj Kho: Thaum peb muab cov tshuaj xws li ntsev, qab zib rau hauv dej, lawv tau yaj tag los ua cov tshuaj sib tov. Nyob rau hauv lwm yam lus, cov solute molecules uniformly disperse nyob rau hauv dej. Cov khoom hauv cov ntsiab lus tseeb yog qhov loj me me, thiab lawv tsis pom. Ntxiv mus, cov khoom no tsis nyob ntawm qhov sawv. Piv txwv ntawm cov kev daws teeb meem tseeb yog:
- Kev daws cov ntsev ntau hauv dej
- Kev daws cov piam thaj hauv dej
- qab zib thiab alum
Colloidal Solution: Qee cov tshuaj yog soluble tag nrho hauv cov tshuaj (qab zib hauv dej), thiab qee qhov yog insoluble tag nrho (xuab zeb hauv dej). Muaj ib pawg nruab nrab ntawm ob hom no; Cov khoom no loj dua li cov molecules thiab me dua li cov khoom ncua kev kawm. Lawv pom nyob rau hauv lub microscope muaj zog. Qee qhov piv txwv ntawm cov tshuaj colloidal yog,
- Starch hauv dej
- Qe albumin hauv dej
