Question

dacă 5,56 g amestec c4h6 si c4h8 reactioneaza cu 3.18 g tollens,raportul molar c4h6:c4h8 este?

Answer 1

Va reactiona doar alchina
CH(=)C-CH2-CH3 - formula de structura
notam raportul molar alchina:alchena=x:y
1mol............................159g
CH(=)C-CH2-CH3 + [Ag(NH3)2]OH -> AgC(=)C-CH2-CH3 + Ag + 2NH3 + H2O
x moli..........................3,18g
159x=3,18 => x=0,02 moli
mamestec=malchina+malchena
malchina=Malchina*0,02=54*0,02=1,08g
malchena=5,56-1,08=4,48g
malchena=56y=4,48 => y=0,08moli
nC4H6:nC4H8=0,02:0,08=1:4