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Em coi xem là metan và axetilen hay metan và etilen nha?
Hoặc xem tăng 2,8gam hay 2,6 gam?
Check kĩ đề giúp anh nha!
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a) \(CH_4+Cl_2\underrightarrow{as}CH_3Cl+HCl\) (pư thế)
b) \(C_2H_4+Br_2\rightarrow C_2H_4Br_2\) (pư cộng)
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a, \(n_{Br_2}=\dfrac{32}{160}=0,2\left(mol\right)\)
PT: \(C_2H_2+2Br_2\rightarrow C_2H_2Br_4\)
Theo PT: \(n_{C_2H_2}=\dfrac{1}{2}n_{Br_2}=0,1\left(mol\right)\)
\(\Rightarrow V=V_{CH_4}=4,48-0,1.22,4=2,24\left(l\right)\)
b, \(n_{CH_4}=\dfrac{2,24}{22,4}=0,1\left(mol\right)\)
\(\Rightarrow\left\{{}\begin{matrix}\%m_{CH_4}=\dfrac{0,1.16}{0,1.16+0,1.26}.100\%\approx38,1\%\\\%m_{C_2H_2}\approx61,9\%\end{matrix}\right.\)
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\(n_{Br_2}=\dfrac{16}{160}=0,1\left(mol\right)\)
PTHH: C2H4 + Br2 --> C2H4Br2
0,1<--0,1
=> \(\left\{{}\begin{matrix}\%V_{C_2H_4}=\dfrac{0,1.22,4}{5,6}.100\%=40\%\\\%V_{CH_4}=100\%-40\%=60\%\end{matrix}\right.\)
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C2H4+Br2->C2H4Br2
x----------x---------x
C2H2+2Br2->C2H2Br4
y--------2y------------y
=>\(\left\{{}\begin{matrix}x+y=\dfrac{0,896}{22,4}\\160x+320y=8\end{matrix}\right.\)
=>x=0,03 mol, y=0,01 mol
=>%VC2H4=\(\dfrac{0,03.22,4}{0,896}\).100=75%
=>%VC2H2=25%
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a.\(m_{dd.Br_2\left(tăng\right)}=m_{C_2H_2}=2,6g\)
\(n_{hh}=\dfrac{5,6}{22,4}=0,25mol\)
\(n_{C_2H_2}=\dfrac{2,6}{26}=0,1mol\)
\(\%V_{C_2H_2}=\dfrac{0,1}{0,25}.100=40\%\)
\(\%V_{CH_4}=100\%-40\%=60\%\)
b.\(C_2H_2+2Br_2\rightarrow C_2H_2Br_4\)
0,1 0,2 ( mol )
\(C_{M\left(dd.Br_2\right)}=\dfrac{0,2}{0,1}=2M\)
- \(nCH_2=CH_2\underrightarrow{t^o,p,xt}\left(-CH_2-CH_2-\right)_n\)
- \(CH_4+Cl_2\underrightarrow{as}CH_3Cl+HCl\)
- \(CH_2=CH_2+Br_2\rightarrow CH_2Br-CH_2Br\)
- \(CH\equiv CH+2Br_2\rightarrow CHBr_2-CHBr_2\)
- \(C_6H_{12}O_6+Ag_2O\underrightarrow{NH_3}C_6H_{12}O_7+2Ag\)