Ta có: \(n_{Br_2}=\dfrac{48}{160}=0,3\left(mol\right)\)

PT: \(C_2H_2+2Br_2\rightarrow C_2H_2Br_4\)

____0,15___0,3 (mol)

\(\Rightarrow\left\{{}\begin{matrix}V_{C_2H_2}=0,15.22,4=3,36\left(l\right)\\V_{CH_4}=2,24\left(l\right)\end{matrix}\right.\)

Bạn tham khảo nhé!

$C_2H_2+2Br_2\to Br_2CH-CHBr_2$

$n_{Br_2}=\dfrac{48}{160}=0,3(mol)$

$\Rightarrow n_{C_2H_2}=\dfrac{n_{Br_2}}{2}=0,15(mol)$

$\Rightarrow V_{C_2H_2}=0,15.22,4=3,36(l)$

$\Rightarrow V_{CH_4}=5,6-3,36=2,24(l)$

a) \(n_{Br_2\left(p\text{ư}\right)}=\dfrac{200.8\%}{160}=0,1\left(mol\right);n_{hh}=\dfrac{7,437}{24,79}=0,3\left(mol\right)\)

PTHH: \(C_2H_4+Br_2\rightarrow C_2H_4Br_2\)

             0,1<-----0,1

b) \(\left\{{}\begin{matrix}\%V_{C_2H_4}=\dfrac{0,1}{0,3}.100\%=33,33\%\\\%V_{CH_4}=100\%-33,33\%=66,67\%\end{matrix}\right.\)

c) \(n_{CH_4}=0,3-0,1=0,2\left(mol\right)\)

PTHH: \(CH_4+2O_2\xrightarrow[]{t^o}CO_2+2H_2O\)

             0,2--->0,4

            \(C_2H_4+3O_2\xrightarrow[]{t^o}2CO_2+2H_2O\)

              0,1--->0,3

\(\Rightarrow V_{O_2}=\left(0,3+0,4\right).24,79=17,353\left(l\right)\)

Gọi số mol C₂H₄, C₂H₂ là a, b (mol)

=> a + b = \(\dfrac{0,672}{22,4}=0,03\left(mol\right)\) (1)

PTHH: C₂H₄ + Br₂ --> C₂H₄Br₂

                a-------------->a

             C₂H₂ + 2Br₂ --> C₂H₂Br₄

                b----------------->b

=> 188a + 346b = 8,8 (2)

(1)(2) => a = 0,01 (mol); b = 0,02 (mol)

=> \(\left\{{}\begin{matrix}\%V_{C_2H_4}=\dfrac{0,01}{0,03}.100\%=33,33\%\\\%V_{C_2H_2}=\dfrac{0,02}{0,03}.100\%=66,67\%\end{matrix}\right.\)

\(a,n_{Br_2}=\dfrac{32}{160}=0,2\left(mol\right)\\ PTHH:C_2H_4+Br_2\rightarrow C_2H_4Br_2\\ Theo.pt:n_{C_2H_4}=n_{Br_2}=0,2\left(mol\right)\\ n_{hhkhi}=\dfrac{6,72}{22,4}=0,3\left(mol\right)\\ n_{CO_2}=0,3-0,2=0,1\left(mol\right)\\ m_{C_2H_4}=0,2.28=5,6\left(g\right)\\ m_{CO_2}=0,1.44=4,4\left(g\right)\\ b,C_{MddBr_2}=\dfrac{0,2}{0,5}=0,4M\)

C2H4+Br2->C2H4Br2

0,15---0,15

n Br2=\(\dfrac{24}{160}\)=0,15 mol

VCH4=5,6-0,15.22,4=2,24l

=>n CH4=\(\dfrac{2,24}{22,4}\)=0,1mol

=>m CH4=0,1.16=16g

=>%CH4=\(\dfrac{2,24}{5,6}\).100=40%

=>%C2H4=100-40=60%

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%

\(n_{hh khí} = \dfrac{8,96}{22,4} = 0,4 (mol)\\ n_{C_2H_4Br_2} = \dfrac{18,8}{188} = 0,1 (mol)\\ PTHH: C_2H_4 + Br_2 \rightarrow C_2H_4Br_2\\ Mol: 0,1 \leftarrow 0,1 \leftarrow 0,1\\ V_{C_2H_4} = 0,1.22,4 = 2,24 (l)\\ V_{CH_4} = 8,96 - 22,4 = 6,72 (l)\\ %V_{CH_4} = \dfrac{0,1}{0,4} = 25%\)

\(n_{C_2H_4} = a\ mol;n_{C_3H_6} = b\ mol\\ \Rightarrow a + b = \dfrac{3,36}{22,4} = 0,15(1)\\ C_2H_4 + Br_2 \to C_2H_4Br_2\\ C_3H_6 + Br_2 \to C_3H_6Br_2\\ m_{tăng} = 28a + 42b = 4,9(2)\\ (1)(2)\Rightarrow a = 0,1; b = 0,05\\ \%V_{C_2H_4} = \dfrac{0,1}{0,15}.100\% = 66,67\%\\ \%V_{C_3H_6} = 100\% -66,67\% = 33,33\%\)

\(n_{C_2H_4} = a(mol) ; n_{C_4H_6} = b(mol)\\ \Rightarrow a + b = \dfrac{6,72}{22,4} = 0,3(1)\\ C_2H_4 + Br_2 \to C_2H_4Br_2\\ C_4H_6 + 2Br_2 \to C_4H_6Br_4\\ n_{Br_2} = a + 2b = \dfrac{64}{160} = 0,4(2)\\ (1)(2) \Rightarrow a = 0,2 ; b = 0,1\\ \Rightarrow \%V_{C_2H_4} = \dfrac{0,2.22,4}{6,72}.100\% = 66,67%; \%V_{C_4H_6} =100\%-66,67\% = 33,33\%\)