C2H4 + Br2 -> C2H4Br2
a a a
C2H2 + 2Br2 -> C2H2Br4
b 2b b
n hỗn hợp khí = \(\dfrac{7.84}{22.4}=0.35mol\)
Ta có: \(\left\{{}\begin{matrix}a+b=0.35\\160a+320b=72\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}a=0.25mol\\b=0.1mol\end{matrix}\right.\)
\(\%VC2H4=\dfrac{0.25\times22.4\times100}{7.84}=71.43\%\)
%VC2H2 = 100 - 71.43 = 28.57%
C2H4 + Br2 -> C2H4Br2
a a a
C2H2 + 2Br2 -> C2H2Br4
b 2b b
n hỗn hợp khí = %VC2H4=0.25×22.4×1007.84=71.43%%VC2H4=0.25×22.4×1007.84=71.43%
%VC2H2 = 100 - 71.43 = 28.57%