Sodium molybdate, chemical formula Na2MoO4, CAS 7631-95-0, yog ib qho inorganic compound nrog cov qauv siv lead ua rhombic. Nws yog ib tug dawb mus rau lub teeb daj khoom, feem ntau muaj nyob rau hauv hmoov daim ntawv. Nws daim ntawv hmoov muaj siab crystallinity thiab purity. Yooj yim rau yaj hauv dej, tsim soluble sodium molybdate. Nws muaj zoo solubility nyob rau hauv dej, ua rau nws lug siv nyob rau hauv aqueous daws. Nws yog ib qho ionic compound, yog li nws muaj qhov zoo conductivity nyob rau hauv lub xeev molten. Txawm li cas los xij, nws cov solubility yog qhov tsawg, yog li cov conductivity ntawm nws cov kua aqueous kuj tsis muaj zog. Raws li ib tug multifunctional inorganic compound, nws muaj dav daim ntawv thov prospects. Hauv ntau qhov chaw, nws lub cev thiab tshuaj lom neeg tshwj xeeb yog siv tag nrho thiab ua lub luag haujlwm tseem ceeb. Nrog rau kev txhim kho txuas ntxiv ntawm kev tshawb fawb thiab thev naus laus zis thiab tshawb nrhiav cov ntawv thov tshiab, nws cov ntawv thov kev cia siab yuav nthuav dav dua. Raws li ib qho zoo heev catalyst, nws yog dav siv nyob rau hauv ntau yam organic tshuaj tiv thaiv. Lub ntsiab kom zoo dua ntawm nws raws li lub catalyst yog nws cov kev ua haujlwm siab thiab kev xaiv, uas tuaj yeem txhawb nqa kev nce qib ntawm ntau yam kev cuam tshuam cov organic. Piv txwv li, nws tuaj yeem siv los ua kom lub cev qhuav dej, cov tshuaj tiv thaiv alkylation, cov tshuaj tiv thaiv acylation, thiab lwm yam ntawm cawv. Thaum lub sij hawm cov txheej txheem kev npaj catalyst, nws tuaj yeem sib xyaw nrog lwm cov hlau oxides lossis hlau oxides thauj khoom ntawm cov cab kuj kom ua tau zoo dua catalytic.
(Cov khoom txuas:https://www.bloomtechz.com/chemical-reagent/laboratory-reagent/sodium-molybdate-solution-cas-7631-95-0.html)
Txoj Kev 1: Kev sib txuas ntawm sodium molybdate los ntawm sodium hydroxide yog ib txoj kev siv ntau.
Cov kauj ruam:
(1) Kev npaj cov khoom siv raw: Ua ntej, peb yuav tsum npaj cov khoom siv raw khoom tsim nyog, suav nrog sodium hydroxide (NaOH) thiab ammonium molybdate ((NH4) 2MoO4).
(2) Dissolution: Dissolve sodium hydroxide hauv dej kom tau txais cov tshuaj sodium hydroxide. Lub caij no, yaj ammonium molybdate hauv dej kom tau txais kev daws ntawm ammonium molybdate.
(3) Kev Sib xyaw: Sib tov sodium hydroxide tov thiab ammonium molybdate tov ua ke kom tau cov tshuaj tov.
(4) Cov tshuaj tiv thaiv: Hauv cov tshuaj sib tov, sodium hydroxide thiab ammonium molybdate raug tshuaj lom neeg, ua rau sodium molybdate thiab dej.
(5) Kev lim dej: Tom qab cov tshuaj tiv thaiv tiav, cov khoom siv tsis zoo thiab cov dej tsim tau raug lim kom tau txais cov tshuaj sodium molybdate.
(6) Kev ziab: ziab cov tshuaj sodium molybdate kom tau txais cov khoom hauv lub xeev ntawm sodium molybdate.
Chemical Equation:
NaOH + (NH4)2MOO4→ Na2MOO4 + 2H2O + 2NH3
Hauv cov tshuaj tiv thaiv no, sodium hydroxide thiab ammonium molybdate yog ob qho tib si reactants. Cov mis mos molecular ntawm sodium hydroxide yog NaOH, uas yog lub hauv paus muaj zog uas tuaj yeem muab hydroxide ions (OH -). Cov mis mos molecular ntawm ammonium molybdate yog (NH4) 2MoO4, uas yog ntsev muaj molybdate ions (MoO42-). Thaum cov sodium hydroxide thiab ammonium molybdate sib xyaw, lawv tau txais cov tshuaj tiv thaiv ob npaug, ua rau sodium molybdate (Na2MoO4), dej (H2O), thiab ammonia (NH3). Dej yog ib qho ntawm cov khoom uas tau tawm hauv daim ntawv gaseous. Ammonia kuj yog cov khoom lag luam, nws yog cov roj alkaline nrog cov ntxhiab tsw ntxhiab.
Txoj Kev 2: Kev sib txuas ntawm sodium molybdate los ntawm dej yog ib txoj kev siv ntau.
Cov kauj ruam:
(1) Kev npaj cov khoom siv raw: Ua ntej, peb yuav tsum tau npaj cov khoom siv raw, suav nrog ammonium molybdate ((NH4) 2MoO4) thiab dej ntshiab (H2O).
(2) Dissolution: Dissolve ammonium molybdate nyob rau hauv dej kom tau ammonium molybdate tov.
(3) Cov tshuaj tiv thaiv: Hauv cov tshuaj ammonium molybdate, ammonium molybdate reacts chemically nrog dej los tsim sodium molybdate (Na2MoO4) thiab hydrated ammonia (NH3 · H2O).
(4) Kev lim dej: Tom qab cov tshuaj tiv thaiv tiav, cov khoom siv tsis zoo thiab cov khoom tsim tawm ammonia raug tshem tawm los ntawm kev pom kom tau txais cov tshuaj sodium molybdate.
(5) Kev ziab: ziab cov tshuaj sodium molybdate kom tau txais cov khoom hauv lub xeev ntawm sodium molybdate.
Chemical Equation:
(NH4)2MOO4 + H2O → Na2MOO4 + 2NH3·H2O
Hauv cov tshuaj tiv thaiv no, ammonium molybdate thiab dej yog ob qho tib si reactants. Cov mis mos molecular ntawm ammonium molybdate yog (NH4) 2MoO4, uas yog ntsev muaj molybdate ions (MoO42-). Thaum ammonium molybdate tov nrog dej, lawv tau txais cov tshuaj tiv thaiv ob npaug, tsim sodium molybdate (Na2MoO4) thiab hydrated ammonia (NH3 · H2O). Hydrated ammonia yog ib qho chaw tsim los ntawm kev sib txuas cov roj ammonia thiab dej molecules. Hauv cov tshuaj tiv thaiv no, dej yog siv los ua cov kuab tshuaj los pab cov tshuaj tiv thaiv zoo.
Txoj Kev 3: Kev sib txuas ntawm sodium molybdate los ntawm sodium carbonate ammonium molybdate txoj kev yog ib txoj kev siv feem ntau synthesis.
Cov kauj ruam:
(1) Kev npaj cov khoom siv raw: Ua ntej, peb yuav tsum tau npaj cov khoom siv raw uas tsim nyog, suav nrog dej qab zib tshauv (Na2CO3), ammonium molybdate [(NH4) 2MoO4], thiab dej.
(2) Dissolution: Dissolve soda tshauv hauv dej kom tau txais cov tshuaj sodium carbonate. Lub caij no, yaj ammonium molybdate hauv dej kom tau txais kev daws ntawm ammonium molybdate.
(3) Kev Sib xyaw: Sib tov sodium carbonate tov thiab ammonium molybdate tov ua ke kom tau cov tshuaj tov.
(4) Cov tshuaj tiv thaiv: Hauv cov tshuaj sib tov, sodium carbonate thiab ammonium molybdate raug tshuaj lom neeg cov tshuaj tiv thaiv, tsim sodium molybdate (Na2MoO4), ammonia (NH3), thiab carbon dioxide (CO.2).
(5) Kev lim dej: Tom qab cov tshuaj tiv thaiv ua tiav, cov khoom siv tsis zoo yog lim kom tau txais cov tshuaj sodium molybdate.
(6) Kev ziab: ziab cov tshuaj sodium molybdate kom tau txais cov khoom hauv lub xeev ntawm sodium molybdate.
Chemical Equation:
Na2CO3 + (NH4)2MOO4 + 2H2O → Na2MOO4 + 2NH3 + CO2 + 2H2O
Hauv cov tshuaj tiv thaiv no, sodium carbonate, ammonium molybdate, thiab dej yog tag nrho cov reactants. Cov mis mos molecular ntawm sodium carbonate yog Na2CO3, uas yog lub hauv paus muaj zog uas tuaj yeem muab carbonate ions (CO32-). Cov mis mos molecular ntawm ammonium molybdate yog (NH4) 2MoO4, uas yog ntsev muaj molybdate ions (MoO42-). Thaum sodium carbonate thiab ammonium molybdate sib xyaw, lawv tau txais cov tshuaj tiv thaiv ob npaug, ua rau sodium molybdate (Na2MoO4), ammonia (NH3), carbon dioxide (CO2), thiab dej (H2O). Ammonia thiab carbon dioxide yog ob qho tib si gases, nrog ammonia muaj ntxhiab tsw, thaum carbon dioxide tuaj yeem siv los npaj cov dej haus xws li dej qab zib. Hauv cov tshuaj tiv thaiv no, dej kuj tau tawm hauv daim ntawv gaseous.
Los ntawm cov tshuaj tiv thaiv no, peb tuaj yeem tau txais high-purity sodium molybdate. Thaum lub sij hawm cov txheej txheem tshuaj tiv thaiv, nws yog ib qho tsim nyog yuav tsum tau them sai sai rau kev tswj tsis tau xws li cov tshuaj tiv thaiv qhov kub thiab txias kom ntseeg tau tias qhov kev ua tau zoo ntawm cov tshuaj tiv thaiv thiab tau txais cov khoom zoo. Tsis tas li ntawd, kev ua haujlwm tsim nyog kuj tseem yuav tsum tau ua thaum lub sij hawm pom thiab ziab kom tsis txhob muaj kab mob los yog poob ntawm cov khoom.