Qhov sib txawv tseem ceeb ntawm sodium carbonate thiab sodium hydrogen carbonate yog tias sodium carbonate hmoov yog hygroscopic whereas sodium hydrogen carbonate hmoov tsis hygroscopic.
Ob qho tib si sodium carbonate thiab sodium hydrogen carbonate yog alkaline, ntsev tebchaw. Tab sis lawv txawv ntawm cov tshuaj thiab lub cev. Raws li rau lub cev muaj zog, hygroscopic xwm ntawm sodium carbonate yog qhov sib txawv loj. Tab sis thaum xav txog cov khoom siv tshuaj, qhov sib txawv loj ntawm sodium carbonate thiab sodium hydrogen carbonate yog qhov muaj hydrogen hauv cov qauv tshuaj ntawm sodium hydrogen carbonate; sodium carbonate tsis muaj hydrogen atoms.
Sodium Carbonate yog dab tsi?
Sodium carbonate yog ntsev muaj cov tshuaj formula Na2CO3. Nws muaj cov npe nrov, "soda soda" thiab "soda ash". Cov ntsev no yog dej-soluble heev. Tsis tas li ntawd, nws yog hygroscopic. Nws txhais tau tias qhov sib xyaw no tuaj yeem nqus dej vapor los ntawm huab cua thaum peb nthuav tawm rau huab cua.
Feem ntau, cov tshuaj no tshwm sim raws li daim ntawv decahydrate. Nws yog crystalline compound uas tuaj yeem nkag mus rau effloresce; tom qab ntawd nws tsim daim ntawv monohydrate. Tsis tas li ntawd, sodium carbonate muaj zog alkaline saj. Thaum peb yaj cov tshuaj no hauv dej, nws tsim ib qho kev daws teeb meem. Hauv nws daim ntawv anhydrous, molar mass yog 105.98 g / mol. Lub melting point yog 851 ° C, thiab nws tsis muaj boiling point vim nws undergoes thermal decomposition thaum cua sov.
Daim duab 01: Hygroscopic Sodium Carbonate
Kev siv ntawm sodium carbonate:
- Raws li dej softener hauv laundering
- Siv hauv kev tsim cov iav, ntawv, rayon, xab npum, thiab tshuaj ntxuav tes
- As a food additive
- Yuav siv los hloov cov dej lye hauv Suav teb
- Ua tus neeg sawv cev ntub dej hauv kev lag luam cib
- Tau ntxuav nyiaj
- Txhawm rau tswj pH thiab carbonate hardness hauv qee lub thoob dej yug ntses
Sodium Hydrogen Carbonate yog dab tsi?
Ib yam li ntawd, sodium hydrogen carbonate yog ntsev muaj cov tshuaj formula NaHCO3. Lub npe nrov rau qhov sib xyaw no yog "baking soda". Lub npe tshuaj yog sodium bicarbonate. Nws tshwm sim raws li cov khoom dawb uas yog crystalline tab sis zoo li cov hmoov zoo. Ntxiv mus, nws muaj alkaline saj uas zoo li sodium carbonate, thiab yog dej soluble tab sis tsis zoo soluble thaum piv rau sodium carbonate. Qhov hnyav ntawm molar yog 84 g / mol. Nws tsis muaj qhov kub thiab txias vim nws pib hloov mus rau hauv sodium carbonate ntawm 50 ° C.
Daim duab 02: Sodium Hydrogen Carbonate Crystals
Kev siv sodium hydrogen carbonate:
- Siv ua noj ua zaub mov rau cov khoom noj khoom haus
- Siv los ua cov hmoov ci
- Raws li tshuaj tua kab: tua kab laum
- Peb tuaj yeem siv nws los tsa cov alkalinity ntawm cov dej hauv pas dej
- Yog tshuaj tua kab mob me
- Rau qhov nruab nrab ntawm cov kua qaub lossis cov hauv paus; vim nws cov khoom amphoteric
Qhov txawv ntawm Sodium Carbonate thiab Sodium Hydrogen Carbonate yog dab tsi?
Ntawm ob lub tebchaw no, sodium carbonate yog ntsev muaj cov tshuaj formula Na2CO3. Nws muaj ob lub sodium atoms thiab tsis muaj hydrogen atoms ib molecule. Cov molar loj ntawm cov tshuaj no yog 105.98 g / mol. Ntxiv mus, lub melting point yog 851 ° C thiab sodium carbonate tsis muaj boiling point vim nws undergoes thermal decomposition thaum cua sov. Ntawm qhov tod tes, sodium hydrogen carbonate yog ntsev muaj cov tshuaj formula NaHCO3. Nws muaj ib tug sodium atom thiab ib hydrogen atom ib molecule. Cov molar loj ntawm cov tshuaj no yog 84 g / mol. Ntxiv mus, nws tsis muaj melting lossis boiling point vim nws pib hloov mus rau sodium carbonate ntawm 50 ° C. Qhov sib txawv tseem ceeb ntawm sodium carbonate thiab sodium hydrogen carbonate yog tias sodium carbonate hmoov yog hygroscopic whereas sodium hydrogen carbonate hmoov tsis yog hygroscopic.
Summary - Sodium Carbonate vs Sodium Hydrogen Carbonate
Sodium carbonate thiab sodium hydrogen carbonate yog ntsev ntawm sodium. Qhov sib txawv tseem ceeb ntawm sodium carbonate thiab sodium hydrogen carbonate yog tias sodium carbonate hmoov yog hygroscopic whereas sodium hydrogen carbonate hmoov tsis yog hygroscopic. Tsis tas li ntawd, sodium hydrogen carbonate muaj hydrogen atom hauv nws cov qauv tshuaj thaum sodium carbonate tsis muaj hydrogen atoms.
