... CTGngthicnglCTPTcahaiestelC3H6O2. Cõu 3:tchỏyhontonhnhp 2este, chosnphmchỏyquabỡnhP2O5dkhilngbỡnh tnglờn6,21gam,sauúchoquaddCa(OH)2dc34,5gamktta.Cỏcestetrờnthuc loi: A.EstenoB.EstekhụngnoC.Esteno,nchc,mchhD.Esteachc ... d n khú) Bi 1:ChoesteC3H6O2xphũnghoỏbiNaOHthucmuicúkhilngbng41/37khi lngeste.TỡmCTCTcaeste. HD:RCOOR Suy lun:Do este n chc m mmui > meste nờn gc R < 23 nờn CT este CH3COOCH3 Chi tit: Ta cú: m ... Dn tCTTBca2esteX,Yl:CnH2n+1COO C m H m 14n 32 VỡX,Yulestenchc,no,mchhnờn: n H 2O = nCO2 =6,38/44=0,145mol meste+ mO2 =44. nCO2 +18 n H 2O meste=3,31gam Tacú:mO(trongeste)=mestemCmH=3,3112.0,1452.1.0,145=1,28gam...