Qhov sib txawv tseem ceeb ntawm volumetric thiab potentiometric titration yog tias volumetric titration ntsuas qhov ntim ntawm cov tshuaj ntsuam xyuas nrog cov reagent, whereas potentiometric titration ntsuas lub peev xwm thoob plaws qhov ntsuas.
Titrations yog cov txheej txheem tshuaj siv los txheeb xyuas tus nqi ntawm cov khoom sib xyaw uas tsis paub muaj nyob rau hauv cov khoom sib xyaw. Hauv cov txheej txheem no, peb siv cov kev daws teeb meem ntawm qhov paub txog kev pom kom pom qhov concentration ntawm qhov tsis paub tam sim no hauv peb cov qauv.
Volumetric Titration yog dab tsi?
Volumetric titrations yog cov txheej txheem tshuaj ntsuam xyuas uas ntsuas qhov ntim ntawm cov tshuaj ntsuam xyuas uas cuam tshuam nrog cov tshuaj reagent muaj qhov paub meej. Hauv cov txheej txheem no, peb tuaj yeem siv cov kev daws teeb meem uas muaj kev paub txog kom pom qhov concentration ntawm qhov tsis paub tam sim no hauv peb cov qauv. Ntawm no, lub ntsiab lus uas tag nrho cov analyte molecules ua tiav nrog reagent molecules hu ua qhov kawg. Yog li ntawd, qhov kawg taw tes qhia qhov kawg ntawm cov tshuaj tiv thaiv ntawm cov tsis paub compound thiab paub compound. Volumetric titrations tuaj yeem ua tau ntau yam. Rov qab titration thiab ncaj titration yog ob hom.
Daim duab 01: Titration Apparatus
Ib qho ncaj qha titration yog txoj kev titration yooj yim uas cuam tshuam cov tshuaj tiv thaiv ntawm qhov tsis paub qhov sib xyaw thiab cov khoom sib xyaw nrog paub qhov concentration. Ntawm no, qhov sib ntxiv ntawm ntau tshaj reagents tsis ua zoo li hauv qab titrations. Cov tsis paub compound yog ncaj qha mus nrog cov paub compound. Yog li ntawd, qhov kawg ntawm qhov titration qhia qhov kawg ntawm cov tshuaj tiv thaiv. Los ntawm kev siv qhov kawg ntawm qhov kawg, tus nqi ntawm cov khoom tsis paub muaj nyob hauv cov qauv kev daws teeb meem tuaj yeem txiav txim siab.
A rov qab titration yog qhov tseem ceeb hauv kev txiav txim siab ntawm qhov tsis paub siv qhov ntau ntawm cov khoom sib xyaw nrog qhov paub txog qhov concentration. Txij li thaum tus nqi ntawm cov compound nrog ib tug paub concentration ntxiv yog paub lawm, peb muaj peev xwm txiav txim seb tus nqi ntawm cov compound uas tau reacted nrog cov tsis paub compound los ntawm kev ua ib tug rov qab titration.
Potentiometric Titration yog dab tsi?
A potentiometric titration yog cov txheej txheem tshuaj ntsuam xyuas uas tuaj yeem siv los ntsuas qhov muaj peev xwm thoob plaws qhov ntsuas. Ntawm no, qhov taw qhia tsis tas yuav txiav txim siab qhov kawg ntawm titration. Txawm li cas los xij, hom titration no zoo ib yam li redox titrations.
Daim duab 02: Cov cuab yeej rau Potentiometric Titration
Nyob rau hauv lub titration apparatus, muaj ob electrodes. Lawv raug hu ua qhov taw qhia electrode thiab siv electrode. Feem ntau, peb siv iav electrodes ua qhov taw qhia electrodes thiab hydrogen electrodes, calomel electrodes thiab nyiaj chloride electrodes raws li siv electrodes. Qhov taw qhia electrode yog qhov tseem ceeb hauv kev saib xyuas qhov kawg ntawm qhov titration. Thaum kawg, qhov kev hloov pauv tam sim ntawd tshwm sim.
Muaj qee qhov zoo ntawm kev siv cov txheej txheem no; e.g. nws tsis xav tau qhov taw qhia thiab yog qhov tseeb ntau dua li phau ntawv titration. Muaj ntau ntau hom kev siv potentiometric titration uas muab rau peb nrog ntau yam kev xaiv nyob ntawm qhov xav tau. Ntxiv mus, hom titrations no ua haujlwm zoo nrog cov tshuab automated.
Qhov txawv ntawm Volumetric thiab Potentiometric Titration yog dab tsi?
Titrations yog cov txheej txheem tshuaj siv los txheeb xyuas tus nqi ntawm cov khoom sib xyaw uas tsis paub muaj nyob rau hauv cov khoom sib xyaw. Qhov sib txawv tseem ceeb ntawm volumetric thiab potentiometric titration yog qhov volumetric titration ntsuas qhov ntim ntawm cov tshuaj ntsuam xyuas nrog cov reagent, hos potentiometric titration ntsuas lub peev xwm thoob plaws qhov ntsuas. Ntxiv mus, volumetric titrations yog ib qho yooj yim thiab ceev thaum piv rau potentiometric titrations.
Hauv qab infographic qhia txog qhov sib txawv ntawm volumetric thiab potentiometric titration.
Summary – Volumetric vs Potentiometric Titration
Titrations yog cov txheej txheem tshuaj siv los txheeb xyuas tus nqi ntawm cov khoom sib xyaw uas tsis paub muaj nyob rau hauv cov khoom sib xyaw. Qhov sib txawv tseem ceeb ntawm volumetric thiab potentiometric titration yog tias volumetric titration ntsuas qhov ntim ntawm cov tshuaj ntsuam xyuas nrog cov reagent, hos potentiometric titration ntsuas lub peev xwm thoob plaws qhov ntsuas.
