are loc o etapa de aditie ,in urma careia alchina trece in alchena
CnH2n-2+ H2----> CnH2n pe catalizator de Pd/ion Pb
am dat valori lui
n=2---> C2H4 se verifica ca are 85,71%C
(2x12+4)g etena..........24gC
100g............................X=.................
CH≡CH+H2---> CH2=CH2
ETINA ETENA