Video: Hom kev sib tov yog xuab zeb?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Xuab zeb yog a sib tov . Xuab zeb yog cais raws li ib tug heterogeneous sib tov vim nws tsis muaj tib yam khoom, muaj pes tsawg leeg thiab tsos thoob plaws hauv lub sib tov . Ib homogeneous sib tov muaj ib tug sib tov thoob plaws. Lub ntsiab feem ntawm xuab zeb yog SiO2, silicon dioxide.
Yog li ntawd, cov xuab zeb sib tov yog dab tsi?
Saib, lub hauv paus ntsiab lus ntawm cov ntshiab xuab zeb yog silica, i.e, silicon dioxide (SiO2). Tab sis kev lag luam xuab zeb feem ntau yog a sib tov ntawm silica thiab lwm yam sib xyaw. Yog li ntawd, xuab zeb tuaj yeem hais tias yog ib sib tov raws li nws yog a sib tov ntawm silica thiab lwm cov tebchaw xws li chlorides, sulphates thiab nitrates.
Qhov thib ob, yog xuab zeb ntsev thiab dej yog qhov sib xyaw ua ke? Cov molecules los yog atoms ua ib homogeneous sib tov muab faib sib npaug, tag nrho hauv tib theem. Dej ntsev xol yog a homogeneous sib tov , piv txwv li, mas ntsev sib xyaw nrog xuab zeb yog a heterogeneous sib tov.
Ntawm no, hom kev sib tov yog dej thiab xuab zeb?
Ib heterogeneous sib tov yog a sib tov ntawm ob lossis ntau yam tshuaj (cov ntsiab lus lossis cov khoom sib txuas). Piv txwv yog: sib tov ntawm xuab zeb thiab dej los yog xuab zeb thiab hlau filings, ib pob zeb conglomerate, dej thiab roj, ib feem zaub xam lav, txoj kev sib tov, thiab pob zeb (tsis yog cement).
Puas yog xuab zeb thiab dej yog homogeneous sib xyaw?
Yog nws yog. A heterogeneous sib tov txhais tau tias koj tuaj yeem pom tus kheej cov khoom thiab cais lawv lub cev. Koj tuaj yeem pom cov khoom ntawm xuab zeb hauv dej txawm koj swb lawv ua ke.
Pom zoo:
Dab tsi yog txoj hauv kev zoo dua los cais cov xuab zeb thiab dej thiab vim li cas?
Nws yog ib qho yooj yim los cais cov xuab zeb thiab dej byfiltering sib tov. Ntsev tuaj yeem sib cais los ntawm kev daws teeb meem los ntawm evaporation. Cov dej kuj tseem tuaj yeem rov qab tau zoo li cov ntsev yog tias cov dej vapor raug kaw thiab txias kom cov dej vapor rov qab rau hauv cov kua. Cov txheej txheem no hu ua distillation
Dab tsi yog txoj kev ntawm kev sib cais sib tov?
Kev sib tov tuaj yeem sib cais siv ntau txoj kev sib cais xws li kev pom, sib cais funnel, sublimation, yooj yim distillation thiab ntawv chromatography. Cov txheej txheem tau hais los saum toj no yog txhua txoj kev siv lub cev
Yuav ua li cas tshwm sim thaum aqueous tov ntawm sodium sulphate thiab barium chloride sib tov?
Thaum cov tshuaj aqueous ntawm sodium sulphate reacts nrog ib tug aqueous tov ntawm barium chloride, precipitate ntawm barium sulphate yog tsim thiab tom qab cov tshuaj tiv thaiv tshwm sim. ii. Yog hais tias cov reactants nyob rau hauv lub cev muaj zog, ces cov tshuaj tiv thaiv yuav tsis tshwm sim. Nws yog ib qho kev hloov pauv ob npaug nrog rau nag lossis daus
Yuav ua li cas koj cais ib tug sib tov ntawm xuab zeb thiab ntsev?
Sib cais ntsev thiab xuab zeb Siv Solubility Ncuav ntsev thiab xuab zeb sib tov rau hauv lub lauj kaub. Ntxiv dej. Kub dej kom txog thaum ntsev yaj. Tshem lub lauj kaub los ntawm tshav kub thiab cia nws txias kom txog thaum nws muaj kev nyab xeeb. Ncuav dej ntsev rau hauv ib lub thawv cais. Tam sim no sau cov xuab zeb
Cov xuab zeb thiab dej puas tuaj yeem sib cais pom?
Kev piav qhia: Kev lim dej ua haujlwm zoo tshaj plaws yog tias cov ntsiab lus tsis yaj hauv cov kuab tshuaj. Piv txwv li, xuab zeb thiab dej tuaj yeem sib cais los ntawm kev pom vim tias ob qho tib si tsis yaj nrog ib leeg. Txawm li cas los xij, cov suab thaj thiab dej yuav tsis raug cais los ntawm kev pom thaum lawv yaj nrog ib leeg