Question

Ex 3, va rog! Schema este cea din dreapta exercitiului 3.

Answer 1

formula chimica a alchinei  CnH2n-2   ,cu masa molara M= 14n-2

CnH2n-2 prin ardere da nCO2 + (n-1)H2O

14n-2g alchina.............18(n-1) H2O

120g.............................108g

108(14n-2)= 120x18(n-1)--------> n=3---> propina

CH≡C-CH3+H2------> CH2=CH-CH3 (a)

CH2=CH-CH3+H2---> CH3-CH2-CH3(b)

CH≡C-CH3 + Cl2---> CHCl=CCl-CH3  (c)

CHCL=CCl-CH3 + Cl2---> CHCL2-CCL2-CH3(d)

CH≡C-CH3+ HCl---> CH2=CCl-CH3 (e)

CH2=CCL-CH3 +HCl---> CH3-CCl2-CH3(f)

CH≡C-CH3+HOH--->[ CH2=COH-CH3](g)⇄ O=CH-CH2-CH3(h)

CH≡C-CH3+ [Ag(NH3)2]OH--->AgC≡C-CH3+2NH3+H2O