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a, \(n_{Br_2}=\dfrac{48}{160}=0,3\left(mol\right)\)
PT: \(C_2H_2+2Br_2\rightarrow C_2H_2Br_4\)
_____0,15____0,3 (mol)
\(\Rightarrow\%V_{C_2H_2}=\dfrac{0,15.22,4}{11,2}.100\%=30\%\)
\(\Rightarrow\%V_{CH_4}=100-30=70\%\)
b, - Khí thoát ra ngoài là CH4.
\(V_{CH_4}=11,2.70\%=7,84\left(l\right)\)
\(a,n_{Br_2}=\dfrac{6,4}{160}=0,04\left(mol\right)\)
PTHH: C2H4 + Br2 ---> C2H4Br2
0,04<---0,04
\(\rightarrow\left\{{}\begin{matrix}V_{C_2H_4}=0,04.22,4=0,896\left(l\right)\\V_{CH_4}=2,24-0,896=1,344\left(l\right)\end{matrix}\right.\\ b,\rightarrow\left\{{}\begin{matrix}\%V_{C_2H_4}=\dfrac{0,896}{2,24}.100\%=40\%\\\%V_{CH_4}=100\%-40\%=60\%\end{matrix}\right.\)
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, \(V_{ddBr_2}=\dfrac{0,3}{0,25}=1,2\left(M\right)\)
\(m_{Br_2}=80g\Rightarrow n_{Br_2}=0,5mol\)
\(C_2H_4+Br_2\rightarrow C_2H_4Br_2\)
0,5 0,5
\(n_{hh}=\dfrac{28}{22,4}=1,25mol\)
\(\Rightarrow n_{CH_4}=1,25-0,5=0,75mol\)
\(\%V_{CH_4}=\dfrac{0,75}{1,25}\cdot100\%=60\%\)
\(\%V_{C_2H_4}=100\%-60\%=40\%\)
\(n_{Br_2}=\dfrac{8}{160}=0,05mol\)
\(\Rightarrow n_{C_2H_4}=0,05mol\Rightarrow m_{C_2H_4}=1,4g\)
\(\%m_{C_2H_4}=\dfrac{1,4}{2}\cdot100\%=70\%\)
\(\%m_{CH_4}=100\%-70\%=30\%\)
\(n_{Br_2}=\dfrac{m_{Br_2}}{M_{Br_2}}=\dfrac{16}{160}=0,1mol\)
\(C_2H_4+Br_2\rightarrow C_2H_4Br_2\)
0,1 0,1 ( mol )
\(\%V_{C_2H_4}=\dfrac{0,1.22,4}{16,8}.100=13,33\%\)
\(\%V_{CH_4}=100\%-13,33\%=86,67\%\)
1. \(n_{Br_2}=0,4.0,5=0,2\left(mol\right)\)
PT: \(C_2H_4+Br_2\rightarrow C_2H_4Br_2\)
Theo PT: \(n_{C_2H_4}=n_{Br_2}=0,2\left(mol\right)\Rightarrow V_{C_2H_4}=0,2.22,4=4,48\left(l\right)\)
2. \(n_{C_2H_4Br_2}=\dfrac{9,4}{188}=0,05\left(mol\right)\)
PT: \(C_2H_4+Br_2\rightarrow C_2H_4Br_2\)
Theo PT: \(n_{C_2H_4}=n_{C_2H_4Br_2}=0,05\left(mol\right)\)
\(\Rightarrow\%V_{C_2H_4}=\dfrac{0,05.22,4}{1,4}.100\%=80\%\)
\(\Rightarrow\%V_{CH_4}=100-80=20\%\)
PT: \(C_2H_4+Br_2\rightarrow C_2H_4Br_2\)
Ta có: \(n_{Br_2}=\dfrac{16}{160}=0,1\left(mol\right)\)
Theo PT: \(n_{C_2H_4}=n_{Br_2}=0,1\left(mol\right)\Rightarrow V_{C_2H_4}=0,1.22,4=2,24\left(l\right)\)
\(\Rightarrow V_{CH_4}=6,72-2,24=4,48\left(l\right)\)
PTHH: \(C_2H_4+Br_2\rightarrow C_2H_4Br_2\)
Ta có: \(n_{Br_2}=\dfrac{4}{160}=0,025\left(mol\right)=n_{C_2H_4}\)
\(\Rightarrow V_{C_2H_4}=0,025\cdot22,4=0,56\left(l\right)\) \(\Rightarrow V_{CH_4}=2,8\left(l\right)\)