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a) C2H4 + Br2 --> C2H4Br2
b) nBr2 = 0,2.0,2 = 0,04 (mol)
PTHH: C2H4 + Br2 --> C2H4Br2
0,04<--0,04
=> \(m_{C_2H_4}=0,04.28=1,12\left(g\right)\)
\(m_{CH_4}=n_{CH_4}.M_{CH_4}=\left(\dfrac{1,12}{22,4}-0,04\right).16=0,16\left(g\right)\)
c) \(\left\{{}\begin{matrix}\%V_{C_2H_4}=\dfrac{0,04.22,4}{1,12}.100\%=80\%\\\%V_{CH_4}=100\%-80\%=20\%\end{matrix}\right.\)
a, \(C_2H_4+Br_2\rightarrow C_2H_4Br_2\)
\(C_2H_2+2Br_2\rightarrow C_2H_2Br_4\)
Ta có: \(n_{C_2H_4}+n_{C_2H_2}=\dfrac{5,6}{22,4}=0,25\left(mol\right)\left(1\right)\)
Theo PT: \(n_{Br_2}=n_{C_2H_4}+2n_{C_2H_2}=\dfrac{48}{160}=0,3\left(mol\right)\left(2\right)\)
Từ (1) và (2) \(\Rightarrow\left\{{}\begin{matrix}x=0,2\left(mol\right)\\y=0,05\left(mol\right)\end{matrix}\right.\)
\(\Rightarrow\left\{{}\begin{matrix}\%V_{C_2H_4}=\dfrac{0,2.22,4}{5,6}.100\%=80\%\\\%V_{C_2H_2}=20\%\end{matrix}\right.\)
b, \(V_{ddBr_2}=\dfrac{0,3}{0,25}=1,2\left(M\right)\)
\(n_{Br_2}=\dfrac{m_{Br_2}}{M_{Br_2}}=\dfrac{16}{160}=0,1mol\)
\(C_2H_4+Br_2\rightarrow C_2H_4Br_2\)
0,1 0,1 ( mol )
\(\%V_{C_2H_4}=\dfrac{0,1.22,4}{16,8}.100=13,33\%\)
\(\%V_{CH_4}=100\%-13,33\%=86,67\%\)
a) C2H4 + Br2 --> C2H4Br2
b) \(n_{Br_2}=\dfrac{24}{160}=0,15\left(mol\right)\)
PTHH: C2H4 + Br2 --> C2H4Br2
0,15<--0,15----->0,15
=> \(\%V_{C_2H_4}=\dfrac{0,15.22,4}{7,84}.100\%=42,857\%\)
=> \(\%V_{CH_4}=\dfrac{7,84-0,15.22,4}{7,84}.100\%=57,143\%\)
c) mC2H4Br2 = 0,15.188 = 28,2 (g)