Lub cev thaj chaw ntawm acetic acid, cov mis

Ordinary siav vinegar lub raj mis, uas muaj peev xwm yuav nrhiav tau nyob rau hauv lub chav ua noj ntawm txhua txhua niam tsev tau muaj li ntau lwm yam acids thiab vitamins. Ntxiv ib tug khub ntawm cov khoom dauv mus rau hauv lub siav khoom noj khoom haus, zaub nyoos ua rau tej yam ntuj tso tsw li. Tab sis ob peb ntawm peb tiag xav txog cov zog thiab cov tiag tiag raws li ntawm cov kev siv ntawm lub ntsiab tivthaiv - acetic acid.

Yuav ua li cas yog khoom no?

Formula acetic acid _CH3COOH uas koom nws mus rau tus xov tooj ntawm carboxylic fatty acids. Qhov kuaj pom ntawm ib tug carboxyl pab pawg neeg (COOH) assigns nws mus rau ib tug monobasic acid. Cov tshuaj yeeb dej caw nyob rau hauv lub ntiaj teb nyob rau hauv ib tug organic daim ntawv thiab yog tau synthetically nyob rau hauv cov kev kuaj. Acid yog lub feem ntau yooj yim, tab sis tsis muaj tsis tseem ceeb sawv cev ntawm nws txoj kev khwv. Yooj yim soluble nyob rau hauv dej, hygroscopic.

Lub cev thaj chaw ntawm acetic acid thiab ceev sib txawv nrog kub. Thaum chav tsev kub 20 ° ^C acid yog nyob rau hauv ib lub kua hauv lub xeev, muaj ib tug ntom ntawm 1.05 g / cm ^3. Nws muaj ib tug meej tsis hnov tsw thiab qaub saj. Ib tug tov ntawm cov tshuaj yeeb dej caw tsis muaj additives hardens thiab yuav muaju ntawm ib tug kub hauv qab no 17 ° ^C. Cov txheej txheem pib boiling acetic acid nyob rau ntawm ib kub saum toj no 117 ° ^C. Methyl pab pawg neeg (CH ₃₎ acetic acid ntawm mis yog tau los ntawm reacting lub alcohols nrog rau oxygen: tshuaj thiab dej fermentation ntawm carbohydrates, souring cawu cub.

Ib me ntsis keeb kwm

Qhib ntawm vinegar yog ib tug ntawm cov thawj nyob rau hauv ib tug series ntawm acid thiab tau ua nyob rau theem. Chiv, acetic acid pib mus rau extract los ntawm distillation as kws tshawb fawb ntawm xyoo lub 8 pua. Txawm li cas los, nyob rau hauv ancient Rome ib yam khoom uas muab tau los ntawm qaub kua txiv hmab twb siv raws li ib tug universal ntses. Tus heev lub npe ntawm Greek txhais tau tias "qaub". Nyob rau hauv lub xyoo pua 17th nyob rau hauv Teb chaws Europe, zaum twb tau mus extract ntshiab tshuaj substance. Nyob rau ntawm lub sij hawm, lawv muab lub mis thiab pom ib tug txawv txawv muaj peev xwm - acetic acid nyob rau hauv lub vapor xeev Cov nroj cig cuag ib tug xiav nplaim taws.

Txog thaum lub xyoo pua puv 19, zaum tau pom lub xub ntiag ntawm acetic acid nyob rau hauv ib tug organic daim ntawv xwb - raws li ib feem ntawm lub tebchaw thiab ntsev ntawm esters. Raws li ib feem ntawm cov nroj tsuag thiab lawv txiv hmab txiv ntoo: apples, txiv hmab. Nyob rau hauv tib neeg thiab tsiaj txhu, hws feem, bile. Nyob rau hauv thaum ntxov xyoo pua 20th, Lavxias teb sab zaum across rho acetaldehyde los ntawm cov tshuaj tiv thaiv ntawm acetylene nrog mercury oxide. Tam sim no, acetic acid noj thiaj li loj hais tias nws cov thawj extraction yuav siv sij hawm qhov chaw tsuas synthetically rau ib tug lossis loj scale.

ntau lawm Txoj kev

Seb hauv daim ntawv ntawm ntshiab acetic acid los yog hauv lub xub ntiag ntawm impurities nyob rau hauv cov tshuaj Nws nyob ntawm tus extraction txoj kev. Khoom noj khoom haus acetic acid yog tau biochemically thaum lub sij hawm ethanol fermentation. Nyob rau hauv kev lag luam, ob peb txoj kev paim acid extraction. Feem ntau, tshua yog nrog los ntawm high kub thiab muaj cov catalysts:

• Methanol nyob rau hauv cov tshuaj tiv thaiv nrog cov pa roj carbon (carbonylation).
• Pa oxidation ntawm cov roj av fractions.
• Pyrolysis ntawm ntoo.
• Pa oxidation ntawm acetaldehyde.

Muaj cov txheej txheem rau zoo thiab yig biochemical. Vim ib tug muaj txheej txheem, tus nqi ntawm cov acetic acid ntau lawm nyob rau hauv lub 20 th thiab 21 th xyoo pua mus txog pua pua ntawm lub sij hawm muab piv nrog rau cov xyoo pua puv 19. Tam sim no, acetic acid los ntawm carbonylation ntawm methanol synthesis muab ntau tshaj 50% ntawm cov ua volume.

Lub cev thaj chaw ntawm acetic acid thiab nws cov cawv nyob rau hauv lub qhov taw qhia

Lub acetic acid kua yog tsis muaj kob. acidity pH 2,4 yog yooj yim qhia tau tseeb txog litmus ntawv. Acetic acid nyob rau hauv kev sib cuag nrog cov xim tsev nws nyob rau hauv qhov taw qhia nyob rau hauv liab. Lub cev thaj chaw ntawm acetic acid hloov visually. Thaum lub kub dauv rau hauv qab no 16 ^{° C,} tus tshuaj yuav siv sij hawm ib tug khoom daim ntawv thiab tsa ib tug me me dej khov muaju. Nws yog npaj meej soluble nyob rau hauv cov dej thiab reacts nrog ib tug ntau ntawm cov kuab tshuaj lwm yam tshaj hydrogen sulfide. Acetic acid thiaj li tag nrho cov ntim kua raws li qhov dilution nrog dej. Ntawm nws tus kheej piav qhia txog lub cev thaj chaw ntawm acetic acid, nws cov xim thiab kev ntxhib los mos, uas koj pom nyob rau hauv cov nram no duab.

Cov tshuaj yeeb dej caw yog cig ntawm ib tug kub ntawm 455 ^{° C} nrog kev tso tawm ntawm tshav kub mus rau 876 kJ / mol. Cov hniav puas luj yog 60,05 g / mol. Lub cev thaj chaw ntawm acetic acid li cov ntsha nyob rau hauv lub tshua yog tsis muaj zog. Lub dielectric qhov yog 6.15 sov li chav nyob. Siab li ceev, - ib tug kuj sib txawv thiab lub cev tej khoom vaj tse acetic acid. Thaum ib tug siab ntawm 40 mm. Hg. Art. thiab ib tug kub ntawm 42 ^{° C} mus pib lub kub txheej txheem. Tab sis twb nyob lub siab ntawm 100 hli. Hg. Art. kub tshwm sim tsuas yog nyob rau 62 ^° C

tshuaj zog

Reacts nrog co thiab oxides tshuaj exhibits nws acidic zog. Rau yav tom ntej dissolving ib tug ntau lub tebchaw, acid ntaub ntawv ntsev uas yog hu ua acetates :. Magnesium, txhuas, poov tshuaj, thiab lwm yam PK nqi ntawm cov acid yog 4,75.

Thaum lub sij hawm sib tham nrog cov gases tuaj mus rau hauv vinegar hloov cov tshuaj tiv thaiv , ua raws li los ntawm xaav thiab tsim ib tug ntau acids: chloroacetic, iodoacetic. Yaj nyob rau hauv dej, acid dissociates nrog qhov kev tso tawm ntawm acetate ions thiab hydrogen protons. Lub degree ntawm dissociation yog 0.4 feem pua.

Lub cev thiab tshuaj thaj chaw ntawm lub acetic acid molecules nyob rau hauv lub crystalline daim ntawv Diamer los tsim hydrogen bonds. Tsis tas li ntawd, nws cov khoom yog tsim nyog los tsim ntau fatty acids, biosynthesis ntawm steriods kho thiab sterols.

laboratory kuaj

Ntes acetic acid nyob rau hauv cov tshuaj yuav ua tau tiav los ntawm tebchaws nws lub zog, xws li tsw. Txaus tshuaj ntxiv mus rau ib tug muaj zog acid, uas pib rau displace vinegar ntsev nrog sib cais ntawm nws cov pa. Los ntawm laboratory distillation COONa CH ₃ thiab H ₂ li ₄ yog tau mus nrhiav tau acetic acid nyob rau hauv qhuav daim ntawv no.

Peb kos kev ntawm lub tsev kawm ntawv cov ntaub ntawv kawm nyob rau hauv Science News for KIDS chav kawm ntawv 8. Lub cev muaj zog kom meej meej qha acetic acid rasstvoreniya tshuaj cov tshuaj tiv thaiv. Nws suffices ntxiv rau ib yam khoom uas nyob rau hauv cov tshuaj, cov tooj liab oxide thiab me ntsis sov. Lub oxide yog kiag li yaj, ua xiavlus tshuaj.

derivatives cov neeg ua hauj

Zoo tshuaj tiv thaiv yeeb tshuaj uas muaj ntau lub ntsiab daim ntawv: esters, amides thiab ntsev. Txawm li cas los, thaum lub sij hawm ntau lawm lwm yam, yuav tsum rau lub cev thaj chaw ntawm acetic acid yog siab. Nws yuav tsum yeej ib txwm muaj ib tug high degree ntawm kev sib nrauj thiab, yog li ntawd, tsis txhob muaj peb-tog impurities.

Nyob rau hauv lub concentration ntawm cov aqueous tov ntawm acetic acid faib ib tug xov tooj ntawm nws cov derivatives. tshuaj yeeb dej caw concentration ntawm ntau tshaj 96% muaj ib lub npe - glacial acetic acid. Acetic acid nyob rau hauv 70-80% yuav yuav nyob rau hauv khw, qhov twg nws yuav tsum tau hu ua - vinegar essence. Vinegar muaj ib tug concentration ntawm 3-9%.

Acetic acid thiab lub neej txhua hnub

Nyob rau hauv tas li ntawd rau cov zaub mov nta, acetic acid muaj ob peb lub zog uas noob neej tau pom nws daim ntawv thov nyob rau hauv lub neej. Ib tug tov ntawm ib tug tsawg concentration ntawm tshuaj yooj yim tshem tawm cov quav hniav ntawm hlau cov khoom, nto tsom iav qhov rais. Muaj peev xwm mus nqus dej kuj plays kev pab. Vinegar yog ib tug zoo eliminates thiab tsw ntxhiab si tsw nyob rau hauv cov chav, tshem tawm tsuas los ntawm txiv hmab txiv ntoo thiab zaub rau cov khaub ncaws.

Raws li nws muab tawm, lub cev cuab yeej ntawm tus acetic acid - mus tshem tawm cov roj ntawm tus nto - yuav siv tau nyob rau hauv pej xeem cov tshuaj thiab cosmetology. Ib tug tsis muaj zog tshuaj ntawm vinegar kho cov plaub hau yuav ua rau lawv ci. Cov tshuaj yeeb dej caw yog dav siv rau cov kev kho mob ntawm mob khaub thuas, qhov kev tshem tawm ntawm cos, thiab cutaneous fungi. Nkag mus rau hauv momentum kev siv cov vinegar nyob rau hauv nyob tus yeees ntawm kom hniav zoo nkauj wraps mus tua cellulite.

Cov kev siv nyob rau hauv qhov siv thiab ua

Cov ntsev ntawm lub tebchaw, thiab lwm yam tshuaj acetic acid ua raws li ib tug tseem ceeb:

• Kws kev lag luam. Yuav kom tsim: aspirin, antiseptic thiab antibacterial ointments, phenacetin.
• Qhuav ntawm cov khoom cua fibers. Incombustible zaj duab xis, cellulose acetate.
• KHOOM NOJ KHOOM HAUS KEV LAG LUAM. Rau kev vam meej preservation, ua pickles thiab cov kua ntsw, raws li ib tug khoom noj khoom haus additive E260.
• Textile kev lag luam. Nkag nrog cov dyes.
• tshuaj pleev ib ce thiab kev tu cov khoom lag luam. Aromatic roj, cream los txhim kho daim tawv nqaij laus.
• Qhuav mordants. Siv raws li ib tug insecticide thiab ib tug mordant ntawm nroj tsuag xwb.
• Siv ntawm varnishes. Kev kuab tshuaj acetone ntau lawm.

Txhua xyoo acetic acid siv yog nce. Tam sim no, nws ntim rau hauv lub ntiaj teb no yog xav paub ntau tshaj 400 txhiab tons rau ib lub hli. acid yog thauj los ntawm ib tug muaj zog hlau tso tsheb hlau luam. Cia nyob rau hauv ib lub hnab yas ntim nyob rau hauv ntau industries vim siab lub cev thiab tshuaj kev ua ntawm acetic acid yog txwv tsis pub los yog tas rau ib lub sij hawm ntawm ob peb lub hlis.

kev nyab xeeb

Acetic acid siab concentration muaj ib tug thib peb degree ntawm ignition thiab emits tshuaj lom pa. Nws yog pom zoo kom hnav tshwj xeeb qhov ncauj qhov ntswg thiab lwm yam kev tiv thaiv cov khoom thaum ua hauj lwm nrog acid. Tuag koob tshuaj rau ib tug tib neeg lub cev los ntawm 20 ml. Thaum lub caij ntawm tso tawm ntawm lub substance mus rau hauv lub acid feem ntau burns lub mucosa, thiab ces muaj feem xyuam rau lwm yam kabmob. Nyob rau hauv xws li mob xav tau tam sim ntawd pw tsev kho mob.

Tom qab kev sib cuag nrog lub acid nyob rau hauv lub raug daim tawv nqaij pom zoo tam sim ntawd rinsed nrog khiav dej. Ces dag hlab acid yuav ua rau cov ntaub so ntswg necrosis, uas kuj yuav tsum tau pw tsev kho mob.

nthuav lus tseeb

Zaum Physiology pom tias ib tug neeg yog tsis yuav tsum tau kev txais tos acetic acid - yuav ua li cas tsis muaj khoom noj khoom haus additives. Tab sis cov neeg uas muaj intolerance rau acid, raws li zoo raws li lub plab teeb meem, tshuaj yeeb dej caw txhob.

Acetic acid yog siv nyob rau hauv typography.

Substance nyob rau hauv ib tug me me npaum li cas twb pom nyob rau hauv zib ntab, txiv tsawb thiab hom qoob mog.

Tom qab txias, acetic acid, thiab dramatically co li muaj peev xwm nrog nws, koj yuav tau saib nws ua txoj hardening.

Ib tug me me concentration ntawm acetic acid yuav txo qhov mob cov tsos mob ntawm kab tom thiab me kub yus.

Txais tos nyob rau hauv khoom noj khoom haus cov khoom nrog ib tug tsawg cov ntsiab lus ntawm acetic acid thiaj li qib roj uas txhaws taus nyob rau hauv lub cev. Cov tshuaj yeeb dej caw yog zoo stabilizes cov ntshav qab zib ntau ntau rau cov diabetics.

Cov kev siv uas muaj protein ntau thiab carbohydrate zaub mov ua ke nrog ib tug me me npaum li cas ntawm acetic acid tsub kom lawv digestibility kab mob.

Yog hais tias cov zaub mov yog ib yam nkaus thiab qab ntsev, cia li ntxiv ib ob peb tee ntawm vinegar rau smooth saltiness.

thaum kawg

Xyoo txhiab siv acetic acid coj mus rau qhov tseeb hais tias nws lub cev thiab tshuaj zog nrhiav lawv txoj kev nyob rau txhua txhua tig. Pua pua ntawm cov tau tshua, txhiab tus pab tshuaj, vim uas noob neej yog yuav mus nyob rau. Tseem ceeb kom paub tag nrho cov yam ntxwv ntawm acetic acid, nws zoo thiab tsis zoo nta.

Tsis txhob hnov qab txog cov kev pab cuam, tab sis peb yuav tsum nco ntsoov li cas puas yuav ua rau ib tug lwj liam siv ntawm ib tug siab concentration ntawm acetic acid. Nyob rau hauv nws cov kev txaus ntshai, nws yog sawv tom ntej no mus hydrochloric acid thiab sulfuric acid. Nco ntsoov muaj kev ruaj ntseg thaum uas siv cov acid. Kom zoo thiab ua tib zoo dilute lub essence ntawm cov dej.