Qhov sib txawv tseem ceeb ntawm MnO2 thiab CuO yog MnO2 yog oxide ntawm manganese, hos CuO yog oxide ntawm tooj liab.
MnO2 thiab CuO yog cov tshuaj inorganic uas muaj qhov zoo sib xws, uas muaj xws li cov khoom dub-xim av ntawm chav tsev kub. Yog li ntawd, nws yog qhov nyuaj heev kom paub qhov txawv ntawm ob lub tebchaw tsuas yog saib lawv, yog li peb xav tau cov txheej txheem kev sim sib txawv los txheeb xyuas lawv cais. Raws li qhov sib txawv yooj yim, lawv muaj cov tshuaj sib txawv; MnO2 muaj manganese nyob rau hauv nws daim ntawv oxide thaum lub CuO compound muaj tooj liab nyob rau hauv nws oxide daim ntawv, uas muaj cov tooj liab nyob rau hauv +2 oxidation xeev.
MnO2 yog dab tsi?
MnO2 yog manganese (IV) oxide uas muaj manganese hauv +4 oxidation xeev. Nws zoo nkaus li cov xim dub-xim av ntawm chav tsev kub. Lawm, nws tshwm sim nyob rau hauv cov ntxhia daim ntawv pyrolusite. Lub npe IUPAC nyiam rau cov tshuaj no yog manganese (IV) oxide. Cov molar loj ntawm MNO2 yog 87 g / mol. Nws yog dej-insoluble khoom. Muaj ntau daim ntawv thov ntawm MnO2. Nws yog tshwj xeeb tshaj yog pab tau raws li ib feem nyob rau hauv qhuav cell roj teeb. Tsis tas li ntawd, nws yog ib qho tseem ceeb hauv cov organic synthesis ua oxidant.
Muaj ntau lub npe polymorphs thiab hydrated forms ntawm MnO2. Ntxiv mus, qhov compound no crystallizes nyob rau hauv daim ntawv ntawm ib tug rutile siv lead ua qauv. Nws muaj qhov chaw octahedral hlau thiab peb qhov sib koom ua ke oxides.
Muaj ob txoj kev tsim khoom ntawm manganese dioxide (MnO2); lawv yog chemical method thiab electrolytic method. Cov txheej txheem tshuaj pib nrog ntuj manganese dioxide, uas muaj impurities. Peb yuav tsum hloov lub ntuj MnO2 rau hauv manganese (II) nitrate siv dinitrogen tetroxide nrog dej. Thaum cua sov, cov ntsev nitrate evaporates, tso N2O4, thiab peb tuaj yeem soj ntsuam cov seem manganese dioxide, uas yog nyob rau hauv daim ntawv ntshiab. Cov txheej txheem electrolytic kuj yog ib txoj hauv kev zoo hauv kev tsim MnO2. Ntawm no, ntshiab manganese dioxide deposits ntawm lub anode.
CuO yog dab tsi?
CuO yog tooj liab (II) oxide. Nws muaj tooj liab hauv +2 oxidation xeev. Nws zoo nkaus li cov xim dub-xim av ntawm chav tsev kub. Nws yog ib qho ntawm ob qhov ruaj khov tshaj plaws oxides ntawm tooj liab. Nyob rau hauv qhov xwm txheej, tooj liab oxide tshwm sim nyob rau hauv ib daim ntawv ntxhia hu ua tenorite. IUPAC lub npe ntawm cov tshuaj no yog tooj liab (II) oxide. Qhov hnyav ntawm molar yog 79.5 g / mol. Nws yog dej-insoluble. Ntxiv mus, nws muaj monoclinic siv lead ua qauv. Ntawm no, ib tug tooj liab atom koom nrog plaub oxygen atoms nyob rau hauv ib square-planar geometry.
Pyrometallurgy yog txoj kev peb nquag siv rau kev tsim CuO. Ntawm no, peb tuaj yeem rho tawm tooj liab oxide los ntawm nws cov ore. Nyob rau hauv cov txheej txheem no, peb yuav tsum tau kho cov ore nrog ib tug sib tov ntawm aqueous ammonium carbonate, ammonia thiab oxygen. Qhov kev kho no pib muab tooj liab (I) thiab tooj liab (II) ammine complexes. Tom qab ntawd peb tuaj yeem decompose cov complexes thiaj li tau txais CuO ntshiab. Ntxiv mus, peb tuaj yeem tsim cov khoom sib xyaw no los ntawm cov cua sov tooj liab nyob rau hauv lub xub ntiag ntawm oxygen thiab.
Dab tsi yog qhov zoo sib xws ntawm MnO2 thiab CuO?
- Ob leeg MnO2 thiab CuO muaj tib yam zoo li xim av xim av, thiab lawv muaj nyob rau hauv theem khoom ntawm chav tsev kub.
- Cov tshuaj no yog insoluble hauv dej.
Qhov txawv ntawm MnO2 thiab CuO yog dab tsi?
Qhov sib txawv tseem ceeb ntawm MnO2 thiab CuO yog MnO2 yog oxide ntawm manganese, hos CuO yog oxide ntawm tooj liab. Tsis tas li ntawd, hauv MnO2, cov hlau atom yog nyob rau hauv +4 oxidation xeev, thaum nyob rau hauv CuO, cov hlau atom nyob rau hauv +2 oxidation xeev.
Ntxiv mus, lwm qhov sib txawv ntawm MnO2 thiab CuO yog tias MnO2 muaj cov qauv siv lead ua rutile, thaum CuO muaj cov qauv monoclinic.
Summary – MnO2 vs CuO
Ob leeg MnO2 thiab CuO muaj tib yam zoo li xim av xim av, thiab lawv muaj nyob rau hauv cov theem khoom ntawm chav tsev kub. Qhov sib txawv tseem ceeb ntawm MnO2 thiab CuO yog MnO2 yog oxide ntawm manganese, hos CuO yog oxide ntawm tooj liab.
