Qhov sib txawv tseem ceeb ntawm sodium bisulfite thiab sodium metabisulfite yog tias sodium bisulfite tsuas muaj ib qho sulfur atom thiab peb oxygens, thiab bisulfite anion yog monovalent whereas, sodium metabisulfite muaj ob sulfur atoms, tsib oxygens, thiab anion. yog divalent.
Ob leeg sodium bisulfite thiab sodium metabisulfite yog ntsev ntawm sodium. Peb tsuas yog siv cov tshuaj no ua cov tshuaj tua kab mob, tshuaj tua kab mob thiab khoom noj khoom haus ntxiv.
Sodium Bisulfite yog dab tsi?
Sodium bisulfite yog cov tshuaj muaj cov tshuaj formula NaHSO3 Nws muaj molar pawg ntawm 104 g mol-1Ntxiv mus, nws tshwm sim raws li cov khoom dawb, thiab thaum nws nyob rau hauv cov kua daim ntawv, nws ua raws li ib tug corrosive kua. Lub melting point ntawm cov khoom yog 150 oC. Tsis tas li ntawd, cov khoom siv ntawm cov tshuaj no yog soluble hauv dej.
Vim muaj peev xwm pub dawb protons, nws yog acidic me ntsis. Ntxiv mus, sulfur atom nyob rau hauv lub compound yog nyob rau hauv lub +4 oxidation xeev. Peb tuaj yeem npaj sodium bisulfite los ntawm bubbling sulfur dioxide gas rau hauv dej carbonated. Nws yuav tso cov roj sulfur dioxide thaum ua pa nrog cov kua qaub me me. Peb tuaj yeem siv qhov sib xyaw no hauv cov organic chemistry rau kev ua kom huv. Nws tsim ib qho bisulfite adduct nrog ib qho aldehyde, uas yog nyob rau hauv daim ntawv. Yog li ntawd, peb tuaj yeem ua kom cov aldehyde los ntawm kev daws los ntawm kev ua kom nws ua bisulfite adduct thiab tom qab ntawd tuaj yeem tsim cov aldehyde los ntawm kev tshem tawm cov bisulfite. Tsis tas li ntawd, sodium bisulfite muaj txiaj ntsig zoo li tus neeg saib xyuas me me, tus neeg saib xyuas cov xim hauv cov organic synthesis. Qhov tseem ceeb tshaj, thaum sodium bisulfite reacts nrog oxygen gas, nws hloov mus rau hauv sodium bisulfate.
Daim duab 01: Cov Qauv Tshuaj ntawm Sodium Bisulfite
Ntawm ntau qhov kev siv ntawm qhov sib xyaw no, qhov tseem ceeb tshaj plaws yog siv los ua zaub mov ntxiv. Nyob ntawd, nws plays lub luag haujlwm tseem ceeb hauv kev tsim cov cawv txiv hmab. Yav dhau los, tib neeg siv sodium bisulfite rau kua txiv hmab txiv ntoo. Tom qab ntawd, cov roj sulfur dioxide tso tawm los ntawm nws, thiab nws yuav pab ntxuav cov kua los ntawm kev tua pwm, kab mob, kab mob thiab lwm yam kab mob uas tsis xav tau. Tsis tas li ntawd, nws yog ib qho tseem ceeb hauv kev khaws cia cawv hauv qhov chaw cia. Lub hom phiaj tseem ceeb ntawm kev ntxiv sodium bisulfite ua cov khoom noj ntxiv yog vim nws lub peev xwm ua haujlwm raws li cov kab mob inhibitor.
Sodium Metabisulfite yog dab tsi?
Sodium Metabisulfite yog cov tshuaj nrog tshuaj formula Na 2S2O 5Peb kuj hu nws ua sodium pyrosulfite. Qhov hnyav molecular ntawm no molecule yog 190 g mol-1 Ntxiv mus, qhov no yog sodium ntsev ntawm divalent ion. Qhov tseem ceeb tshaj, qhov sib xyaw no qhia txog kev ruaj ntseg hauv nws cov anion. Nyob ntawd, ob qhov tsis zoo them oxygen atoms khi nrog txhua tus sulfur atom, uas tso cai rau cov anions tsim cov qauv resonance.
Daim duab 02: Sodium Metabisulfite
Tsis tas li ntawd, sodium metabisulfite yog cov hmoov dawb crystalline nrog lub melting point 150 o C. Tsis tas li ntawd, qhov no yog dawb do soluble hauv dej thiab tuaj yeem tso cov pa roj sulfur dioxide. Sodium metabisulfite muaj txiaj ntsig zoo li cov tshuaj tua kab mob thiab tshuaj tua kab mob xws li sodium bisulfite.
Qhov txawv ntawm Sodium Bisulfite thiab Sodium Metabisulfite yog dab tsi?
Sodium bisulfite yog cov compound uas muaj cov tshuaj formula NaHSO3 thiab Sodium Metabisulfite yog cov compound nrog tshuaj formula Na2S 2O5 Qhov sib txawv tseem ceeb ntawm sodium bisulfite thiab sodium metabisulfite yog tias sodium bisulfite tsuas muaj ib qho sulfur atom thiab peb oxygen atoms, thiab bisulfite anion yog monovalent whereas, sodium metabisulfite muaj ob sulfur atoms, tsib oxygen atoms, thiab anion yog divalent.
Ntxiv mus, sodium sulfite muab sulfite tsawg dua li sodium metabisulfite ua, thaum peb yaj nws hauv dej. Yog li qhov no kuj yog qhov sib txawv ntawm sodium bisulfite thiab sodium metabisulfite. Ntau qhov sib txawv tau pom hauv infographic ntawm qhov sib txawv ntawm sodium bisulfite thiab sodium metabisulfite.
Summary – Sodium Bisulfite vs Sodium Metabisulfite
Sodium bisulfite yog cov khoom noj ntxiv uas muaj E222 tus lej. Sodium metabisulfite kuj yog cov khoom noj ntxiv, thiab tus lej yog E223. Txawm li cas los xij, lawv yog ob qhov sib txawv. Qhov sib txawv tseem ceeb ntawm sodium bisulfite thiab sodium metabisulfite yog tias sodium bisulfite tsuas muaj ib qho sulfur atom thiab peb oxygens, thiab bisulfite anion yog monovalent whereas, sodium metabisulfite muaj ob sulfur atoms, tsib oxygens, thiab anion divalent.
