Qhov sib txawv tseem ceeb ntawm phosphoric acid thiab citric acid yog phosphoric acid yog cov ntxhia tsis muaj zog, qhov citric acid yog cov organic acid tsis muaj zog.
Phosphoric acid thiab citric acid yog cov tsis muaj zog acids. Yog li, cov kua qaub no tsis tuaj yeem cuam tshuam tag nrho rau hauv ions; lawv tsuas tuaj yeem cuam tshuam ib nrab rau hauv ions.
Phosphoric Acid yog dab tsi?
Phosphoric acid yog cov ntxhia tsis muaj zog acid uas muaj cov tshuaj formula H 3 PO 4 Lub npe IUPAC ntawm cov tshuaj no yog orthophosphoric acid, thiab peb tuaj yeem txheeb xyuas nws tias yog cov kua qaub uas tsis muaj tshuaj lom. Tsis tas li ntawd, nws yog ib qho tseem ceeb phosphorous-muaj compound uas yog dihydrogen phosphate ion (H2PO4-.) yog muab los. Yog li ntawd, ions hauv phosphoric acid yog qhov tseem ceeb heev rau cov nroj tsuag vim tias nws yog qhov loj ntawm phosphorous.
Daim duab 01: Cov qauv ntawm Phosphoric Acid
Cov molar loj ntawm phosphoric acid yog 97.99 g / mol. Yuav muaj hydrated thiab anhydrous cov ntaub ntawv ntawm no compound. Phosphoric acid zoo nkaus li cov khoom dawb uas yog deliquescent thiab tsw tsw. Ntxiv mus, phosphoric acid ntau lawm muaj ob txoj kev: txheej txheem ntub dej thiab thermal txheej txheem. Cov txheej txheem ntub dej siv fluoroapetite (phosphate pob zeb) rau kev tsim cov kua qaub no, nrog rau cov concentrated sulfuric acid. Cov tshuaj tiv thaiv yog raws li nram no:
Ca5(PO4)3F + 5H2SO 4 + 10H2O →3H3PO4 + 5CaSO4.2H2O + HF
Nyob rau hauv cov txheej txheem thermal, kua phosphorous (P4) thiab huab cua tau txais cov tshuaj tiv thaiv hauv lub cub tawg ntawm 1800-3000 K. Ua ntej, lub tshuab txau cov kua phosphorus mus rau hauv lub cub tawg chamber, qhov twg cov phosphorous hlawv nyob rau hauv cov huab cua reacting nrog oxygen (O2). Cov khoom ntawm cov kauj ruam no reacts nrog dej nyob rau hauv lub hydration ntauwd los tsim cov kua qaub.
P4(l)+ 5O2(g)→2P2O 5(g)
P2O5(g)+ 3H2O (l)→2H3PO4(aq)
Kev siv ntau tshaj plaws thiab tseem ceeb ntawm phosphoric acid yog kev tsim cov chiv uas muaj phosphorus. Tsis tas li ntawd, muaj peb yam tseem ceeb ntawm phosphate ntsev uas muaj txiaj ntsig zoo li cov chiv: triple phosphate, diammonium hydrogenphosphate, thiab monoammonium dihydrogenphosphate.
Citric Acid yog dab tsi?
Citric acid yog cov organic acid tsis muaj zog uas tshwm sim hauv cov txiv hmab txiv ntoo citrus. Txij li thaum muaj ntau daim ntawv thov ntawm no compound, manufacturers nyiam tsim ib tug ntau ntawm citric acid ib xyoos twg. Qee qhov ntawm nws cov ntawv thov tseem ceeb suav nrog kev siv los ua cov kua qaub, ua ib qho flavouring, thiab chelate agent. Peb tuaj yeem soj ntsuam cov kua qaub no tshwm sim hauv ob daim ntawv raws li daim ntawv anhydrous thiab daim ntawv monohydrated.
Daim ntawv anhydrous ntawm citric acid yog daim ntawv tsis muaj dej. Nws tshwm raws li cov khoom tsis muaj xim thiab tsis muaj ntxhiab thiab. Tsis muaj dej hauv nws daim ntawv qhuav, granulated. Peb tuaj yeem tsim cov tshuaj no los ntawm crystallization los ntawm dej kub.
Daim duab 02: Citric Acid hauv Daim Ntawv Khoom
Cov citric acid anhydrous yog tsim los ntawm daim ntawv monohydrate ntawm 78 ° C. Qhov ceev ntawm daim ntawv anhydrous yog 1.665 g / cm3. Nws melts ntawm 156 ° C, thiab lub boiling point ntawm no compound yog 310 ° C. Cov tshuaj formula ntawm no compound yog C6H8O7, thaum molar mass yog 192.12 g. /mol.
Monohydrate citric acid yog cov dej uas muaj citric acid. Nws muaj ib tug dej molecule txuam nrog ib tug citric acid molecule. Peb hu cov dej no yog dej ntawm crystallization. Daim ntawv no ntawm citric acid yog tsim los ntawm crystallization los ntawm dej txias.
Dab tsi zoo sib xws ntawm Phosphoric Acid thiab Citric Acid?
- Phosphoric acid thiab citric acid yog cov tsis muaj zog acids.
- Ob lub kua qaub tsis tuaj yeem sib cais tag nrho; lawv dissociate ib nrab rau hauv ions
- Lawv yog cov tsis muaj tshuaj lom.
Qhov txawv ntawm Phosphoric Acid thiab Citric Acid yog dab tsi?
Phosphoric acid thiab citric acid yog cov tsis muaj zog acids. Yog li, cov kua qaub no tsis tuaj yeem cuam tshuam tag nrho rau hauv ions; lawv tsuas tuaj yeem cuam tshuam ib nrab rau hauv cov ions. Qhov sib txawv tseem ceeb ntawm phosphoric acid thiab citric acid yog tias phosphoric acid yog cov ntxhia ntxhia acid, thaum citric acid yog cov organic acid tsis muaj zog. Tsis tas li ntawd, phosphoric acid zoo nkaus li cov khoom dawb uas yog deliquescent, thaum citric acid zoo li tsis muaj xim tsis muaj xim / granules lossis ua kua.
Cov lus qhia hauv qab no qhia qhov sib txawv ntawm phosphoric acid thiab citric acid hauv daim ntawv tabular.
Summary – Phosphoric Acid vs Citric Acid
Phosphoric acid yog cov ntxhia tsis muaj zog acid uas muaj cov tshuaj formula H 3 PO 4,thaum citric acid yog cov organic acid tsis muaj zog, thiab nws tshwm sim nyob rau hauv cov txiv hmab txiv ntoo citrus. Qhov sib txawv tseem ceeb ntawm phosphoric acid thiab citric acid yog tias phosphoric acid yog cov ntxhia ntxhia acid, hos citric acid yog cov organic acid tsis muaj zog.
