Qhov sib txawv tseem ceeb ntawm iodometry thiab iodimetry yog tias peb tuaj yeem siv Iodometry kom muaj nuj nqis oxidizing tus neeg sawv cev, hos peb tuaj yeem siv iodimetry kom muaj nuj nqis txo cov neeg ua haujlwm.
Iodometry thiab iodimetry yog ob txoj kev titration uas muaj txiaj ntsig zoo hauv kev tshuaj ntsuam chemistry. Lub hauv paus ntawm ob hom titrations yog oxidation-txo, thiab peb tuaj yeem siv nws los txiav txim siab hom redox ntau npaum li cas. Lub hauv paus ntawm titration yog cov tshuaj tiv thaiv ntawm cov tshuaj ntsuam xyuas thiab tus qauv reagent hu ua titrant. Peb tuaj yeem txiav txim siab qhov ntau ntawm cov tshuaj ntsuam xyuas yog tias peb paub cov tshuaj tiv thaiv, stoichiometry thiab qhov ntim / qhov loj ntawm titrant xav tau los cuam tshuam tag nrho nrog cov tshuaj ntsuam xyuas. Ntxiv mus, peb tuaj yeem siv iodine rau qhov redox titrations vim nws muaj peev xwm ua kom nrawm nrawm nrog ntau hom. Reversibility ntawm iodine / iodide, cov tshuaj tiv thaiv kuj yog qhov zoo dua thaum siv lawv hauv cov tshuaj tiv thaiv iodometric.
Ioometry yog dab tsi?
Hauv iodometry, iodides hnov mob nrog lwm tus neeg sawv cev oxidizing hauv nruab nrab acidic lossis nruab nrab nruab nrab. Thaum cov tshuaj tiv thaiv no tshwm sim, iodide (peb ntxiv iodide hauv daim ntawv KI) oxidizes rau iodine thiab lwm hom yuav raug txo los ntawm iodide. Tom qab ntawd peb tuaj yeem titrate cov iodine tso tawm nrog lwm hom. Hom titrating no yog cov qauv kev daws teeb meem ntawm tus neeg sawv cev txo qis, uas muaj peev xwm txo tau iodine rov qab rau hauv daim ntawv iodide. Feem ntau, peb siv cov txheej txheem thiosulphate tov rau qhov no. Piv txwv li, yog tias peb xav kom suav cov tshuaj chlorine yaj hauv qhov sib tov, cov hauv qab no yog txoj hauv kev los ua ib qho iodometric titration.
Ua ntej, peb yuav tsum coj tus naj npawb ntawm cov ntim los ntawm kev sib xyaw (hauv cov tshuaj chlorine yaj) rau hauv lub khob titration. Tom qab ntawd peb tuaj yeem titrate nws nrog cov kev daws teeb meem ntawm KI, thiab peb tuaj yeem pom cov ntim tau siv.
Ua raws li cov tshuaj tiv thaiv redox yuav tshwm sim hauv cov tshuaj tiv thaiv lub khob;
Cl2 + 2I– -> 2 Cl– + I 2
Daim duab 01: Kev Hloov Xim ntawm Iodometry
Tom qab ntawd peb yuav tsum ua lwm qhov titration nrog tib qhov sib tov los txiav txim seb qhov tso tawm ntawm iodine. Rau qhov no, peb tuaj yeem titrate qhov sib tov nrog tus qauv thiosulphate tov. Peb yuav tsum tau ntxiv cov hmoov txhuv nplej siab ua ib qho taw qhia, txhawm rau txiav txim siab qhov kawg ntawm cov tshuaj tiv thaiv no. Nrog iodine thiab hmoov txhuv nplej siab nyob rau hauv qhov sib tov, nws yuav tshwm sim hauv cov xim tsaus-xiav, tab sis thaum kawg taw tes thaum tag nrho cov iodine tiav lawm, cov xim tsaus yuav ploj.
I2 + 2 S2O32− → S4O62− + 2 I -
Los ntawm ob lub ntsiab lus saum toj no, peb tuaj yeem txiav txim siab tus nqi Cl2.
Iodimetry yog dab tsi?
Nyob rau hauv iodimetry, nws siv iodine dawb mus rau titration nrog ib tug txo tus neeg sawv cev. Yog li, iodine txo qis rau iodide, thiab iodine yuav oxidize lwm hom.
Daim duab 02: Ua Titration
Vim peb tsis tuaj yeem npaj cov tshuaj iodine dawb, peb yuav tsum sib tov iodine nrog potassium iodide thiab KI3 tshuaj los npaj cov tshuaj uas xav tau. Thiab ib qho kev daws teeb meem ntawm qhov no yog siv rau iodometric titrations.
KI+I2 → KI3
Cov tshuaj tiv thaiv tom qab tshwm sim thaum titrating. Peb tuaj yeem siv cov hmoov txhuv nplej siab ua qhov taw qhia rau iodometric titrations ib yam nkaus.
I2 + txo tus neeg sawv cev → 2 I–
Qhov txawv ntawm Ioometry thiab iodimetry yog dab tsi?
Iodometry yog qhov kev soj ntsuam ntau ntawm cov tshuaj oxidizing tus neeg sawv cev los ntawm kev ntxiv ib qho iodide uas reacts los tsim iodine, uas yog ces titrated whereas iodimetry yog ib tug volumetric tsom xam uas muaj xws li titration nrog ib tug standardized tov ntawm iodine, los yog tso tawm. los ntawm ib yam khoom nyob rau hauv kev soj ntsuam ntawm iodine nyob rau hauv daim ntawv soluble, yog li ntawd peb yuav txiav txim siab nws concentration los ntawm titration. Qhov no yog ib qho txawv ntawm iodometry thiab iodimetry.
Tsis tas li ntawd, lwm qhov sib txawv ntawm iodometry thiab iodimetry yog tias, hauv iodometry, iodides hnov mob nrog lwm tus neeg oxidizing nyob rau hauv ib qho nruab nrab acidic los yog nruab nrab nruab nrab thaum nyob rau hauv iodimetry, nws siv dawb iodine mus undergo titration nrog ib tug txo tus neeg sawv cev.
Cov hauv qab no nthuav tawm qhov sib txawv ntawm iodometry thiab iodimetry hauv daim ntawv tabular.
Summary – Iodometry vs Iodimetry
Txawm hais tias ob lo lus iodometry thiab iodimetry suab zoo ib yam, lawv yog ob txoj kev sib txawv uas peb siv hauv kev tshuaj ntsuam chemistry. Qhov sib txawv tseem ceeb ntawm iodometry thiab iodimetry yog tias peb tuaj yeem siv Iodometry los ntsuas cov oxidizing cov neeg ua haujlwm, thaum peb tuaj yeem siv iodimetry los ntsuas cov neeg ua haujlwm txo qis.
