Qhov txawv ntawm KF thiab Coulometer yog dab tsi

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Qhov txawv ntawm KF thiab Coulometer yog dab tsi
Qhov txawv ntawm KF thiab Coulometer yog dab tsi

Video: Qhov txawv ntawm KF thiab Coulometer yog dab tsi

Video: Qhov txawv ntawm KF thiab Coulometer yog dab tsi
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Qhov sib txawv tseem ceeb ntawm KF thiab coulometer yog tias nyob rau hauv KF txoj kev, titrant yog ntxiv ncaj qha rau cov qauv siv lub burette, whereas nyob rau hauv lub coulometer, lub titrant yog generated electrochemically nyob rau hauv lub cell titration.

KF thiab coulometer yog ob lub ntsuas ntsuas. Cov cuab yeej no muaj npe raws li cov txheej txheem titration.

KF yog dab tsi?

KF lossis Karl Fischer titration yog ib hom kev titration classic uas siv coulometric lossis volumetric titration los txiav txim seb cov dej hauv cov qauv. Cov txheej txheem no tau tsim thawj zaug hauv xyoo 1935 los ntawm German Chemist Karl Fischer. Tam sim no, txoj kev no yog siv los ntawm Karl Fischer titrator automated.

Thaum xav txog cov ntsiab lus tshuaj ntawm cov txheej txheem no, cov tshuaj tiv thaiv theem pib uas yog lub luag haujlwm rau kev ntsuas dej hauv Karl Fischer titration yog oxidation ntawm sulfur dioxide nrog iodine. Cov tshuaj tiv thaiv no tsuas yog siv ib qho molar sib npaug ntawm cov dej nrog iodine. Cov iodine yuav tsum tau ntxiv rau cov tshuaj kom txog thaum nws los txog rau qhov kev txwv ntau dhau. Qhov no yog qhov kawg ntawm qhov titration, thiab peb tuaj yeem tshawb xyuas qhov point no siv potentiometry. Ntxiv mus, cov tshuaj tiv thaiv tshwm sim nyob rau hauv lub xub ntiag ntawm ib tug cawv tov uas muaj lub hauv paus uas yuav haus cov sulfur trioxide thiab hydroiodic acid uas yog tsim intermediate.

Caulometer yog dab tsi?

Ib coulometer yog ib qho cuab yeej siv rau kev tshuaj xyuas tshuaj uas tuaj yeem txiav txim siab tus nqi ntawm cov khoom uas tau tso tawm hauv electrolysis los ntawm kev ntsuas qhov ntau ntawm cov hluav taws xob uas siv. Piv txwv li, cov nyiaj coulometer yog ib qho cuab yeej siv los txiav txim siab qhov loj ntawm cov nyiaj tso rau ntawm lub platinum cathode ntawm txoj kev ntawm hluav taws xob tam sim no nyob rau hauv lub xub ntiag ntawm aqueous silver nitrate tov.

KF vs Coulometer hauv Tabular Form
KF vs Coulometer hauv Tabular Form

Muaj ob hom coulometry: tswj cov peev xwm coulometry thiab amerostatic coulometry. Hauv kev tswj cov peev txheej coulometry, peb tuaj yeem siv peb-hluav taws xob potentiostat los teeb tsa lub peev xwm. Txawm li cas los xij, lub amperostatic coulometry khaws qhov tam sim no tas li siv lub amperostat, uas yog ntsuas hauv amperes.

Tsis tas li ntawd, potentiostatic coulometry tuaj yeem piav qhia raws li cov txheej txheem uas feem ntau hu ua "bulk electrolysis." Nws muaj qhov ua haujlwm electrode khaws cia ntawm qhov muaj peev xwm tsis tu ncua uas qhov tam sim no ntws los ntawm Circuit Court tuaj yeem ntsuas. Peb tuaj yeem siv qhov peev xwm no mus rau qhov ntev uas txaus los txo lossis oxidize tag nrho cov kab hluav taws xob ua kom tiav hauv kev daws teeb meem.

Qhov txawv ntawm KF thiab Coulometer yog dab tsi?

Qhov sib txawv tseem ceeb ntawm KF thiab coulometer yog tias nyob rau hauv KF txoj kev, titrant yog ntxiv ncaj qha rau cov qauv siv lub burette whereas, nyob rau hauv lub coulometer, lub titrant yog generated electrochemically nyob rau hauv lub cell titration. Ntxiv mus, KF titration ntsuas cov dej hauv ntau yam khoom, thaum lub coulometer ntsuas cov hluav taws xob siv los yog tsim tawm. Tsis tas li ntawd, KF yog cov txheej txheem volumetric, qhov coulometer yog cov txheej txheem coulometric.

Hauv qab no yog cov ntsiab lus ntawm qhov sib txawv ntawm KF thiab coulometer hauv daim ntawv teev npe rau kev sib piv ntawm ib sab.

Summary – KF vs Coulometer

KF titration yog ib hom kev titration classic uas siv coulometric lossis volumetric titration los txiav txim seb cov dej nyob hauv cov qauv. Lub coulometer yog ib qho cuab yeej siv rau kev tshuaj xyuas tshuaj uas tuaj yeem txiav txim siab tus nqi ntawm cov khoom uas tau tso tawm hauv electrolysis los ntawm kev ntsuas qhov ntau ntawm cov hluav taws xob uas siv. Qhov sib txawv tseem ceeb ntawm KF thiab coulometer yog tias nyob rau hauv KF txoj kev, titrant yog ntxiv ncaj qha rau cov qauv siv ib tug burette, whereas nyob rau hauv lub coulometer, lub titrant yog generated electrochemically nyob rau hauv lub cell titration.

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