Qhov sib txawv tseem ceeb ntawm picric acid thiab benzoic acid yog picric acid yog muaj nyob rau hauv cov xim daj xim hmoov, whereas benzoic acid yog muaj raws li crystalline khoom uas tsis muaj xim.
Picric acid thiab benzoic acid yog cov organic sib txuas tseem ceeb hauv cov organic synthesis tshuaj. Cov tshuaj no tsim cov tshuaj aqueous uas muaj pH qis dua 7.0.
Picric Acid yog dab tsi?
Picric acid yog cov organic compound uas muaj cov tshuaj formula (O2N)3C6 H2OH. Lub npe IUPAC ntawm cov tshuaj no yog 2, 4, 6-trinitrophenol. Nws muaj iab saj, uas ua rau nws lub npe "picric," uas yog hais txog "iab saj" hauv lus Greek. Picric acid yog cov acidic phenols tshaj plaws. Zoo ib yam li lwm cov nitrated organic tebchaw, picric acid kuj tawg, uas txhais nws daim ntawv thov loj. Txawm li cas los xij, nws muaj qee qhov kev siv tshuaj thiab; raws li tshuaj tua kab mob, kho qhov txhab kub hnyiab, thiab ua cov zas xim.
Daim duab 01: Cov Qauv Tshuaj ntawm Picric Acid
Feem ntau, lub nplhaib qauv ntawm phenol molecule yog cov nquag nquag. Nws yog qhib rau ntawm electrophilic hloov cov tshuaj tiv thaiv. Yog li ntawd, thaum peb sim rau nitration ntawm phenol, txawm siv dilute nitric acid, nws muab siab molecular hnyav tars. Tom qab ntawd, peb yuav tsum tau nitrate nws nrog concentrated nitric acid. Nyob ntawd, pawg nitro nyiam hloov sulfonic acid pawg. Cov tshuaj tiv thaiv no yog exothermic heev. Yog li ntawd, peb yuav tsum ua tib zoo tswj qhov kub thiab txias ntawm cov tshuaj tiv thaiv sib tov. Qhov no yog ib txoj hauv kev tsim cov picric acid. Xwb, peb tuaj yeem tsim cov tshuaj no los ntawm nitration ntawm 2, 4-dinitrophenol siv nitric acid.
Daim duab 02: Pom ntawm Picric Acid
Muaj ntau yam kev siv picric acid, suav nrog nws siv hauv munitions thiab explosives, nyob rau hauv kev npaj ntawm crystalline ntsev ntawm organic bases, nyob rau hauv zus tau tej cov alloys, zus tau tej cov tshuaj Bouin, thiab lwm yam.
Y Benzoic Acid yog dab tsi?
Benzoic acid yog qhov yooj yim tshaj plaws aromatic carboxylic acid. Cov mis mos molecular ntawm benzoic acid yog C6H5COOH. Cov molar loj ntawm benzoic acid yog hais txog 122.12 g / mol. Ib qho benzoic acid molecule yog tsim los ntawm ib lub nplhaib benzene hloov nrog ib pawg carboxylic acid (-COOH).
Daim duab 03: Cov Qauv Tshuaj ntawm Benzoic Acid
Nyob rau hauv chav tsev kub thiab siab, benzoic acid yog dawb crystalline khoom. Nws yog me ntsis soluble hauv dej. Benzoic acid muaj qhov tsw qab ntxiag. Lub melting point ntawm benzoic acid yog hais txog 122.41 ° C. Cov ntsiab lus kub ntawm benzoic acid yog muab raws li 249.2 ° C, tab sis nws decomposes ntawm 370 ° C.
Benzoic acid tuaj yeem hloov pauv hluav taws xob uas muaj ntxhiab tsw qab vim yog cov khoom siv hluav taws xob rho tawm ntawm pawg carboxylic. Carboxylic acid tuaj yeem muab lub nplhaib uas muaj ntxhiab nrog pi electrons. Tom qab ntawd nws yuav nplua nuj nyob rau hauv electrons. Yog li, electrophiles tuaj yeem hnov qab nrog lub nplhaib uas muaj ntxhiab.
Qhov txawv ntawm Picric Acid thiab Benzoic Acid yog dab tsi?
Picric acid thiab benzoic acid yog cov organic sib txuas tseem ceeb hauv cov organic synthesis tshuaj. Cov tshuaj no tsim cov tshuaj aqueous uas muaj pH qis dua 7.0. Qhov sib txawv tseem ceeb ntawm picric acid thiab benzoic acid yog picric acid yog muaj nyob rau hauv cov xim daj xim hmoov daim ntawv, whereas benzoic acid yog muaj raws li ib tug crystalline khoom uas tsis muaj xim. Ntxiv mus, picric acid tsis muaj ntxhiab tsw, thaum benzoic acid muaj qhov muag tsis pom, tsw qab.
Cov hauv qab no qhia txog qhov sib txawv ntawm picric acid thiab benzoic acid hauv daim ntawv tabular rau ib sab ntawm kev sib piv.
Summary – Picric Acid vs Benzoic Acid
Picric acid yog cov organic compound uas muaj cov tshuaj formula (O2N)3C6 H2OH. Benzoic acid yog qhov yooj yim tshaj plaws aromatic carboxylic acid. Qhov sib txawv tseem ceeb ntawm picric acid thiab benzoic acid yog picric acid yog muaj nyob rau hauv cov xim daj xim hmoov daim ntawv, whereas benzoic acid muaj nyob rau hauv crystalline khoom uas tsis muaj xim.
