Question

Intre reactia dintre alcan si clor se obtine gaz.Determinati formula acestui gaz, cunoscand ca el este de 3,5 ori mai greu decit dioxidul de carbon, si contine7,79% de carbon. Scrie ecuatia reactiei de obtinere a acestui halogenoalcan

Answer 1

CnH2n+2  + xCl2-------> CnH2n+2-xClx + xHCl

M,derivat= 14n+2-x+35,5x=14n+2+34,5x

avand doua ecuatii trebuie alcatuit un sistem cu 2 ecuatii

M,derivat= 3,5oriM,CO2---> 3,5ori44

14n+2+34,5x= 154...    .................................................o ecuatie

14n+2+34,5x g..............12n gC

100g.................................7,79  g

1200n=109n+15,58+  268,75x........................a doua ecuartie

rezolva sistemul si vei obtine   CCl4