Qhov Tseem Ceeb Qhov txawv - Acetic Acid vs Acetate
Qhov sib txawv tseem ceeb ntawm acetic acid thiab acetate yog tias acetic acid yog cov khoom nruab nrab thaum acetate yog anion uas muaj cov hluav taws xob tsis zoo.
Acetic acid yog cov organic compound uas pab tsim cov kua qaub thaum acetate ion yog lub hauv paus ntawm acetic acid. Qhov tseem ceeb tshaj plaws, kev tsim cov acetate ion tshwm sim los ntawm kev tshem tawm ntawm hydrogen atom hauv pawg carboxylic ntawm acetic acid.
YAcetic Acid yog dab tsi?
Acetic acid yog cov organic compound uas muaj cov tshuaj formula CH3COOH. Cov molar loj ntawm cov tshuaj no yog 60 g / mol thaum lub npe IUPAC ntawm cov tshuaj no yog Ethanoic acid. Tsis tas li ntawd, nyob rau hauv chav tsev kub, acetic acid yog cov kua tsis muaj xim uas muaj qaub saj. Acetic acid yog categorized li carboxylic acid vim muaj cov carboxylic acid pawg (-COOH).
Daim duab 1: Acetic Acid Molecule
Glacial acetic acid yog cov ntsiab lus ntawm acetic acid. Ntxiv mus, acetic acid muaj pungent tsw, uas zoo ib yam li cov tsw ntawm vinegar thiab ib tug yam ntxwv qaub saj thiab. Nws kuj yog ib qho tsis muaj zog acid vim nws dissociates ib feem nyob rau hauv aqueous tov, tso acetate anion thiab ib tug proton. Acetic acid muaj ib tug dissociable proton ib molecule. Txawm li cas los xij, glacial acid yog ib qho khaus khaus heev.
Acetic acid yog ib qho yooj yim carboxylic acid; Qhov tseeb, nws yog qhov yooj yim thib ob carboxylic acid. Nyob rau hauv cov khoom ntawm acetic acid, cov molecules tsim chains ntawm molecules ntawm hydrogen bonding. Txawm li cas los xij, nyob rau theem vapor ntawm acetic acid, nws tsim dimers (ob lub molecules txuas rau ib leeg ntawm hydrogen bonds). Txij li cov kua acetic acid yog polar protic hnyav, nws yog miscible nrog ntau cov polar thiab nonpolar solvents.
Acetate yog dab tsi?
Acetate yog ib qho anion tsim los ntawm kev tshem tawm hydrogen atom los ntawm acetic acid. Cov anion no muaj cov nqi tsis zoo (tus nqi yog -1 vim qhov kev tso tawm ntawm ib qho proton). Acetate ion tsis tuaj yeem nyob twj ywm raws li ib tus neeg sib xyaw vim nws cov nqi, uas yog qhov ua haujlwm zoo heev. Yog li, nws tshwm sim feem ntau raws li ntsev ntawm alkali hlau. Acetate ion yog conjugate puag ntawm acetic acid, uas yog li tsim los ntawm dissociation ntawm acetic acid.
Daim duab 2: Acetate Anion
Cov tshuaj formula ntawm no anion yog C2H3O2 − whilenws lub npe IUPAC yog ethanoate. Tsis tas li ntawd, molar mass ntawm acetate yog 59 g / mol. Tshwj xeeb, ntawm pH qhov tseem ceeb tshaj 5.5, acetic acid tshwm sim raws li acetate anion, tso ib tug proton spontaneously. Qhov no yog vim tias, ntawm pH siab, acetate ion ruaj khov dua li acetic acid.
Qhov txawv ntawm Acetic Acid thiab Acetate yog dab tsi?
Acetic Acid vs Acetate |
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| Acetic acid yog cov organic compound uas muaj cov tshuaj CH 3COOH. | Acetate yog ib qho anion tsim los ntawm kev tshem tawm ntawm hydrogen atom los ntawm acetic acid. |
| Molar Mass | |
| Cov molar loj ntawm acetic acid yog 60 g / mol. | Tab sis qhov molar loj ntawm acetate yog 59 g / mol. |
| nqi hluav taws xob | |
| Acetic acid tsis tau them nqi. | Acetate muaj tus nqi tsis zoo. |
| qeb | |
| Acetic acid yog cov organic molecule. | Acetate yog cov organic anion. |
| pH | |
| Acetic acid molecules ruaj khov ntawm tus nqi pH qis (nyob ib puag ncig pH 5). | Acetate ion ruaj khov ntawm pH siab (siab dua pH 5.5). |
Summary – Acetic Acid vs Acetate
Acetic acid yog qhov yooj yim thib ob carboxylic acid. Acetate, ntawm qhov tod tes, yog anion muab los ntawm acetic acid. Qhov sib txawv tseem ceeb ntawm acetic acid thiab acetate yog tias acetic acid yog qhov nruab nrab qhov sib txuas thaum acetate yog anion muaj qhov tsis zoo hluav taws xob.
