Qhov sib txawv tseem ceeb ntawm esterification thiab neutralization yog tias esterification tsim cov ester los ntawm cov kua qaub thiab cawv, qhov nruab nrab ua rau ntsev los ntawm cov kua qaub thiab lub hauv paus.
Esterification thiab neutralization yog ob qho kev cuam tshuam tseem ceeb ntawm chemistry. Esterification, raws li nws lub npe implies, yog ib qho tshuaj tiv thaiv uas tsim ib qho ester thaum kawg ntawm cov tshuaj tiv thaiv. Neutralization yog hais txog qhov sib npaug ntawm acidity los ntawm alkalinity.
Esterification yog dab tsi?
Esterification yog txheej txheem ntawm kev tsim cov ester los ntawm cov kua qaub thiab cawv. Cov kua qaub feem ntau yog carboxylic acid, thiab cov cawv yuav tsum yog thawj lossis theem nrab cawv. Thiab, cov tshuaj tiv thaiv tshwm sim nyob rau hauv acidic ib puag ncig. Yog li, peb siv sulfuric acid ua cov kua qaub muaj zog rau cov tshuaj tiv thaiv. Nws ua raws li cov tshuaj tiv thaiv rau cov tshuaj tiv thaiv vim tias kev sib xyaw ntawm carboxylic acid thiab cawv tsis muaj dab tsi yog tias qhov nruab nrab tsis yog acidic. Raws li ib tug byproduct, dej molecules yog tsim. Yog li ntawd, qhov no yog ib tug condensation tshuaj.
Pi daim ntawv cog lus nyob rau hauv pawg carbonyl ntawm cov carboxylic acid tuaj yeem ua lub hauv paus vim yog qhov cuam tshuam ntawm cov hluav taws xob vim qhov sib txawv ntawm electronegativity ntawm oxygen thiab carbon atoms. Cov electrons nyob rau hauv daim ntawv cog lus pi yog muab rau ib hydrogen atom nyob rau hauv sulfuric acid molecule. Yog li, qhov no hloov pauv -C=O daim ntawv cog lus rau -C-OH.
Daim duab 01: Ib qho piv txwv ntawm Kev Sib Tham Esterification
Ntawm no, cov pa roj carbon atom muaj tus nqi zoo vim tias nws tsuas muaj peb daim ntawv cog lus tshuaj nyob ib puag ncig nws. Peb hu qhov no yog carbocation. Nyob rau hauv lub xub ntiag ntawm ib tug cawv, ib leeg electron khub nyob rau hauv lub oxygen atom ntawm cawv yuav muab electrons rau cov pa roj carbon atom ntawm carbocation. Yog li ntawd, cawv ua raws li ib tug nucleophile. Tom qab ntawd, rov kho dua tshiab thiab tsim cov ester thiab cov dej molecule.
Neutralization yog dab tsi?
Neutralization yog ib hom tshuaj tiv thaiv uas cov kua qaub reacts nrog lub hauv paus los tsim cov ntsev thiab dej. Yog li, cov tshuaj tiv thaiv no suav nrog kev sib xyaw ua ke ntawm H+ ions thiab OH– ions, thiab nws tsim dej. Li no, tsis muaj hydrogen ions lossis hydroxide ions ntau dhau hauv cov tshuaj tiv thaiv sib xyaw tom qab ua tiav cov tshuaj tiv thaiv.
Yog tias cov kua qaub muaj zog ua rau lub hauv paus muaj zog, ces pH ntawm cov tshuaj tiv thaiv zaum kawg yog 7. Tsis tas li ntawd, pH ntawm cov tshuaj tiv thaiv sib tov nyob ntawm cov kua qaub zog ntawm cov reactants. Thaum xav txog cov kev siv ntawm neutralization, nws yog ib qho tseem ceeb hauv kev txiav txim siab qhov tsis paub txog cov kua qaub lossis cov hauv paus, hauv cov txheej txheem kev kho dej khib nyiab, hauv kev ua kom tsis zoo ntawm plab hnyuv siab nrog cov tshuaj antacid, thiab lwm yam.
Dab tsi yog qhov zoo sib xws ntawm Esterification thiab Neutralization?
- Ob qhov kev cuam tshuam tsim dej ua cov khoom lag luam
- Ob qhov kev cuam tshuam cuam tshuam nrog kev sib xyaw ntawm H+ ions thiab OH–
Qhov txawv ntawm Esterification thiab Neutralization yog dab tsi?
Esterification thiab neutralization yog cov tshuaj tiv thaiv tseem ceeb hauv chemistry. Qhov sib txawv tseem ceeb ntawm esterification thiab neutralization yog tias esterification tsim cov ester los ntawm cov kua qaub thiab cawv, qhov nruab nrab ua rau ntsev los ntawm cov kua qaub thiab lub hauv paus. Tsis tas li ntawd, cov reactants rau esterification yog carboxylic acid thiab cawv thaum rau nruab nrab, cov reactants yog acids thiab bases.
Ntxiv mus, lwm qhov sib txawv ntawm esterification thiab neutralization yog tias esterification yuav tsum muaj cov catalyst xws li sulfuric acid thaum neutralization tsis xav tau cov catalyst.
Summary – Esterification vs Neutralization
Esterification thiab neutralization yog cov tshuaj tiv thaiv tseem ceeb hauv chemistry. Hauv cov ntsiab lus, qhov sib txawv tseem ceeb ntawm esterification thiab neutralization yog tias esterification tsim cov ester los ntawm cov kua qaub thiab cawv, qhov nruab nrab ua rau cov ntsev los ntawm cov kua qaub thiab lub hauv paus.
