Qhov sib txawv tseem ceeb ntawm acetic acid thiab propionic acid yog acetic acid yog carboxylic acid uas muaj ob lub atoms carbon, whereas propionic acid yog carboxylic acid uas muaj peb carbon atoms.
Acetic acid thiab propionic acid yog yooj yim carboxylic acids muaj ob thiab peb carbon atoms ib molecule, feem. Lawv muaj cov tshuaj lom neeg thiab lub cev sib txawv.
YAcetic Acid yog dab tsi?
Acetic acid yog qhov yooj yim thib ob carboxylic acid uas muaj cov tshuaj formula CH 3 COOH. Nws yog cov kua uas tsis muaj xim uas muaj pungent, zoo li vinegar. Nws muaj ib tug txawv qaub saj thiab. Cov tshuaj no muaj ib pawg methyl txuas nrog carboxylic acid. Nws yog ib tug tsis muaj zog acid vim nws dissociates ib feem nyob rau hauv ib tug aqueous tov. Cov molar loj ntawm acetic acid yog 60.05 g / mol. Lub hauv paus conjugate ntawm cov kua qaub no yog acetate ion. Ntxiv mus, lub systemic IUPAC lub npe ntawm acetic acid yog ethanoic acid.
Nyob hauv nws daim ntawv, acetic acid form chains los ntawm interconnecting cov molecules los ntawm hydrogen bonds. Nyob rau hauv nws vapor theem, muaj dimers ntawm acetic acid. Tsis tas li ntawd, hauv nws lub xeev ua kua, nws yog hydrophilic protic hnyav. Ntxiv mus, ntawm physiological pH tej yam kev mob, cov compound no muaj nyob rau hauv ib tug tag nrho ionized daim ntawv li acetate. Peb tuaj yeem tsim cov acetic acid hauv ob qho tib si hluavtaws thiab cov kab mob fermentation. Ntxiv rau cov no, nyob rau hauv txoj kev hluavtaws, acetic acid yog tsim los ntawm methanol carbonylation.
YPropionic Acid yog dab tsi?
Propionic acid yog qhov yooj yim thib peb carboxylic acid uas muaj cov tshuaj formula CH3CH2CO2 H. Nws muaj peb carbon atoms ib propionic acid molecule. Tsis tas li ntawd, nws cov molar loj yog 74.079 g / mol. Nws tshwm sim raws li colourless, oily kua ntawm tus qauv kub. Nws kuj muaj ib tug pungent, rancid tsw. Ntxiv mus, qhov sib xyaw no yog miscible nrog dej, thiab peb tuaj yeem tshem tawm ntawm dej los ntawm kev ntxiv ntsev.
Nyob rau hauv ob qho tib si kua thiab vapor theem, propionic acid tshwm sim li dimers. Tsis tas li ntawd, peb tuaj yeem tsim cov kua qaub no hauv kev lag luam-teev ntawm hydrocarboxylation ntawm ethylene nyob rau hauv muaj cov catalyst. Feem ntau, cov catalyst peb siv yog nickel carbonyl compounds.
Qhov txawv ntawm Acetic Acid thiab Propionic Acid yog dab tsi?
Acetic acid yog qhov yooj yim thib ob carboxylic acid, muaj cov tshuaj formula CH3COOH, hos Propionic acid yog qhov thib peb yooj yim carboxylic acid, muaj cov tshuaj formula CH 3CH2CO2H. Qhov sib txawv tseem ceeb ntawm acetic acid thiab propionic acid yog acetic acid yog carboxylic acid, muaj ob lub atoms carbon whereas propionic acid yog carboxylic acid, muaj peb carbon atoms.
Tsis tas li ntawd, lwm qhov sib txawv ntawm acetic acid thiab propionic acid yog lawv cov ntxhiab tsw; acetic acid muaj pungent, vinegar zoo li tsw thaum propionic acid muaj pungent, rancid tsw. Ntxiv mus, nyob rau hauv daim ntawv ntawm cov khoom, acetic acid form chains los ntawm interconnecting lub molecules los ntawm hydrogen bonds, whereas nyob rau hauv lub vapor theem, nws tsim dimers thiab nyob rau hauv nws cov kua xeev, nws yog ib tug hydrophilic protic hnyav. Txawm li cas los xij, hauv ob theem ua kua thiab vapor, muaj cov dimers ntawm propionic acid.
Summary – Acetic Acid vs Propionic Acid
Acetic acid yog qhov yooj yim thib ob carboxylic acid, muaj cov tshuaj formula CH3COOH, hos Propionic acid yog qhov yooj yim thib peb carboxylic acid muaj cov tshuaj formula CH 3CH2CO2H. Qhov sib txawv tseem ceeb ntawm acetic acid thiab propionic acid yog acetic acid yog carboxylic acid, muaj ob lub carbon atoms, whereas propionic acid yog carboxylic acid, muaj peb carbon atoms.
