Sodium Chloride vs Sodium Iodide
Sodium, uas cim tias Na yog ib pawg 1 lub ntsiab lus nrog tus lej atomic 11. Sodium muaj cov khoom ntawm pawg 1 hlau. Nws txoj kev teeb tsa hluav taws xob yog 1s2 2s2 2p6 3s1Nws tuaj yeem tso tawm ib qho hluav taws xob, uas yog nyob rau hauv 3s sub orbital thiab tsim ib qho +1 cation. Electronegativity ntawm sodium yog tsawg heev, tso cai rau nws tsim cations los ntawm pub ib tug electron rau ib tug siab dua electronegative atom (xws li halogens). Yog li ntawd, sodium feem ntau ua ionic compounds xws li sodium chloride thiab sodium iodide.
Sodium Chloride
Sodium chloride, uas tseem hu ua ntsev, yog xim dawb siv lead ua nrog cov mis molecular NaCl. Sodium chloride yog ib qho ionic compound. Sodium yog ib pawg 1 hlau, yog li tsim ib qho +1 them cation. Chlorine yog ib qho nonmetal thiab muaj peev xwm tsim tau ib qho -1 them anion. Nrog rau electrostatic attraction ntawm Na+ cation thiab Cl– anion, NaCl tau txais cov qauv lattice. Nyob rau hauv lub siv lead ua, txhua sodium ion yog ib puag ncig los ntawm rau chloride ions, thiab txhua chloride ion yog surrounded los ntawm rau sodium ions. Vim yog tag nrho cov kev nyiam ntawm ions, cov qauv siv lead ua ruaj khov dua. Tus naj npawb ntawm ions tam sim no nyob rau hauv sodium chloride crystal nws txawv nrog qhov loj ntawm nws. Sodium chloride yog yooj yim soluble nyob rau hauv dej thiab ua ib tug s alty daws. Aqueous sodium chloride thiab molten sodium chloride tuaj yeem ua hluav taws xob vim muaj cov ions. NaCl feem ntau yog tsim los ntawm evaporating seawater. Nws kuj tuaj yeem tsim los ntawm cov txheej txheem tshuaj, xws li ntxiv HCl rau hauv cov hlau sodium. Cov no yog siv los ua zaub mov preservatives, hauv kev npaj zaub mov, ua tus neeg sawv cev ntxuav, rau kev kho mob, thiab lwm yam. Txhawm rau ua cov ntsev iodized, tib neeg ntxiv cov khoom siv iodine xws li potassium iodate, potassium iodide, sodium iodate lossis sodium iodide, kom ua kom zoo dua sodium chloride.
Sodium Iodide Nyob
Cov tshuaj formula ntawm sodium iodide yog NaI. Qhov no yog xim dawb crystalline, tsis muaj ntxhiab tsw, uas yooj yim yaj hauv dej. Iodine yog halogen, uas tuaj yeem tsim -1 them ions. Ua ke nrog Na+ cations, iodide ions ua cov kab lattice loj. Molar mass ntawm NaI ionic compound yog 149.89 g / mol. Nws melting point yog 661 ° C, thiab lub boiling point yog 1304 ° C. Sodium iodide feem ntau yog siv los ua ib qho ntxiv rau ntsev, los tiv thaiv iodine deficiency. Iodine yog ib yam kab mob, uas yuav tsum tau nyob rau hauv peb lub cev. Cov thyroid caj pas ua raws li iodine cia thiab rau nws txoj haujlwm zoo hauv kev tsim cov tshuaj hormones xws li thyroxin, triiodothyronine thiab calcitonin, iodine yuav tsum muaj. Goiter lossis o thyroid caj pas yog cov tsos mob ntawm iodine deficiency. 150 μg ntawm iodine yog xav tau txhua hnub rau lub cev noj qab haus huv. Sodium iodide ntxiv rau ntsev thiab muab rau cov neeg uas muaj iodine tsis txaus los daws cov teeb meem no. Thaum NaI muaj xov tooj cua iodides zoo li I-123, cov tshuaj no tuaj yeem siv rau hauv xov tooj cua duab lossis kho mob qog noj ntshav.
Dab tsi yog qhov txawv ntawm Sodium Chloride thiab Sodium Iodide?
• Sodium chloride yog qhia ua NaCl. Cov tshuaj formula ntawm sodium iodide yog NaI.
• Hauv NaCl, sodium yog sib txuas nrog halogen chlorine, uas yog electronegative ntau dua li Iodine hauv NaI.
• Sodium chloride muaj ntau dua li sodium iodide.
• NaI soluble hauv dej ntau dua NaCl.
• Sodium chloride feem ntau hu ua ntsev thiab sodium iodide yog ib qho ntxiv rau ntsev kom txo tau cov iodine deficiency hauv tib neeg.
