Alchina: CnH2n-2
daer=Malchina/Maer => Malchina=0,9*28,9=26g/mol
Malchina=14n-2=26 => n=2
alchina: acetilena
a)
C2H2 + HCl -(HgCl2)-> CH2=CH-Cl
nCH2=CH-Cl -> (-CH2-CH(Cl)-)n
b)
C2H2 + 2Cl2 -> Cl2CH-CHCl2
Cl2CH-CHCl2 + 2Cl2 -(lumina)-> Cl3C-CCl3 + 2HCl
pe scurt:
1mol.....4moli.....1mol
C2H2 + 4Cl2 -> CCl3-CCl3 + 2HCl
1mol.....4moli.....1mol
C2H2:Cl2=1:4