Qhov sib txawv tseem ceeb ntawm iodide thiab triiodide yog tias iodide yog ib qho iodine atom muaj nqi -1 thaum triiodide yog kev sib xyaw ntawm peb iodine atoms muaj -1 tag nrho cov nqi.
Iodide thiab triiodide yog ob hom anions ntawm iodine. Ob lub ions no feem ntau tshwm sim ua ke hauv cov tshuaj aqueous, muaj qhov sib npaug nrog cov diiodide anion.
Iodide yog dab tsi?
Iodide yog anion ntawm iodine. Qhov no anion tsim thaum lub iodine atom tau txais ib qho hluav taws xob los ntawm sab nraud. Raws li, cov cim tshuaj ntawm iodide yog I
–, thiab molar mass ntawm no ion yog 126.9 g / mol. Peb lub npe tshuaj lom neeg muaj xws li anion feem ntau ua "iodides". Qhov tseem ceeb tshaj plaws, iodide yog qhov loj tshaj plaws monatomic anion vim tias nws tsim los ntawm iodine atom uas muaj atomic loj piv. Tsis tas li ntawd, iodide tsim kev sib piv tsis muaj zog nrog cov ions tawm tsam vim nws yog ion loj. Vim tib lub laj thawj, iodide tsawg hydrophilic dua li lwm cov anions me.
Daim duab 01: Iodide Anion
Feem ntau, cov tebchaw uas muaj iodide ions xws li iodide ntsev yog dej-soluble tab sis tsis zoo li dej-soluble li chlorides thiab bromides. Tsis tas li ntawd, cov kev daws teeb meem aqueous uas muaj cov anion no tuaj yeem ua rau kom muaj kev sib haum xeeb ntawm iodine molecules (I 2) zoo dua li dej ntshiab.
YTriiodide yog dab tsi?
Triiodide yog cov anion uas muaj peb iodine atoms sib koom ua ke nrog -1 tus nqi tsis zoo. Cov tshuaj formula ntawm cov compound no yog I3– Nws yog ib qho ntawm cov polyhalogeno ions tsim los ntawm kev sib xyaw ua ke ntawm aqueous daws ntawm iodide ntsev thiab iodine. Hauv cov tshuaj aqueous, cov ion no tsim cov xim liab-xim av.
Daim duab 02: Cov Qauv Tshuaj ntawm Triiodide Anion
Lub sij hawm triiodide yog siv los sau npe rau lwm cov tshuaj sib txuas uas muaj cov triiodide anion ua ib lub npe. Ntxiv mus, lo lus no tuaj yeem siv rau cov tebchaw uas muaj peb lub chaw iodide uas tsis muaj kev khi rau ib leeg tab sis muaj nyob ua ke cais iodide ions. E.g. Nitrogen triiodide thiab phosphorous triiodide muaj nitrogen thiab phosphorous centres, ntsig txog, qhov twg muaj peb iodine atoms txuas rau txhua lub chaw, yog li peb tuaj yeem muab lawv lub npe hu ua triiodide compounds.
Triiodide anion yog linear. Nws kuj yog symmetrical. Muaj peb equatorial ib leeg electron khub ntawm lub hauv paus iodine atom ntawm no anion. Hauv no anion, I-I daim ntawv cog lus ntev ntev dua li I-I daim ntawv cog lus nyob rau hauv diatomic iodine compound. Txawm li cas los xij, thaum lub triiodide anion nyob rau hauv ionic compounds, qhov ntev daim ntawv cog lus yuav txawv raws li.
Thaum lub triiodide ion nyob rau hauv qis concentration nyob rau hauv ib co aqueous tov, cov tshuaj tshwm nyob rau hauv daj xim. Yog hais tias qhov concentration siab, cov tshuaj tshwm nyob rau hauv cov xim liab-xim av. Ntxiv mus, no anion yog lub luag hauj lwm rau cov xim xiav-dub uas tshwm sim thaum starch reacts nrog iodine tov.
Thaum xav txog lwm cov kev daws teeb meem uas muaj triiodide anion, Lugol's iodine tov thiab tincture ntawm iodine tov muaj ntau npaum li cas ntawm triiodide anion.
Zoo sib xws ntawm Iodide thiab Triiodide
- YLawv yog anions ntawm iodine.
- Ob leeg yog tus nqi tsis zoo.
Qhov txawv ntawm Iodide thiab Triiodide
Iodide thiab triiodide yog ob hom anions ntawm iodine. Qhov sib txawv tseem ceeb ntawm iodide thiab triiodide yog tias iodide yog ib qho iodine atom uas muaj tus nqi -1, thaum triiodide yog kev sib xyaw ntawm peb iodine atoms muaj -1 tag nrho cov nqi. Ntxiv mus, thaum iodide tsim lub teeb txiv kab ntxwv-xim av aqueous daws, triiodide tsim cov xim liab-xim av aqueous daws ntawm high concentrations thiab daj xim tov ntawm tsawg concentrations.
Daim duab hauv qab no qhia txog qhov sib txawv ntawm iodide thiab triiodide hauv daim ntawv tabular.
Summary – Iodide vs Triiodide
Iodide thiab triiodide yog ob hom anions ntawm iodine. Qhov sib txawv tseem ceeb ntawm iodide thiab triiodide yog tias iodide yog ib qho iodine atom uas muaj tus nqi -1, thaum triiodide yog kev sib xyaw ntawm peb iodine atoms muaj -1 tag nrho cov nqi.
