Cho 11,2 lit hỗn hợp gồm C2H6 và C2H4 đi qua dung dịch brom 2M dư. Sau PỨ thấy bình đựng dung dịch brom tăng 5,6g. Tính:
a) %m mỗi khí trong hỗn hợp
b) Thể tích dung dịch brom
Nhờ anh chị, các bạn giúp em bài này. Em cảm ơn.
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(n_{C_3H_3Ag}=\dfrac{7,35}{147}=0,05\left(mol\right)\)
=> \(n_{C_3H_4}=0,05\left(mol\right)\)
\(n_{Br_2}=\dfrac{6,4}{160}=0,04\left(mol\right)\)
=> \(n_{C_2H_4}=0,04\left(mol\right)\)
=> \(\left\{{}\begin{matrix}\%C_3H_4=\dfrac{0,05.40}{5,52}.100\%=36,23\%\\\%C_2H_4=\dfrac{0,04.28}{5,52}.100\%=20,29\%\\\%C_2H_6=100\%-36,23\%-20,29\%=43,48\%\end{matrix}\right.\)
=> A
Cho hỗn hợp qua dung dịch brom chỉ có etylen tác dụng.
\(n_{Br_2}=0,25\cdot1,5=0,375mol\)
\(C_2H_4+Br_2\rightarrow C_2H_4Br_2\)
0,375 0,375
\(V_{C_2H_4}=0,375\cdot22,4=8,4l\Rightarrow V_{CH_4}=11-8,4=2,6l\)
a.\(m_{Br_2}=m_{C_2H_4}=11,2g\)
\(n_{hh}=\dfrac{13,44}{22,4}=0,6mol\)
\(n_{C_2H_4}=\dfrac{11,2}{28}=0,4mol\)
\(\%V_{C_2H_4}=\dfrac{0,4}{0,6}.100=66,66\%\)
\(\%V_{CH_4}=100\%-66,66\%=33,34\%\)
\(m_{CH_4}=\left(0,6-0,4\right).16=3,2g\)
\(\%m_{C_2H_4}=\dfrac{11,2}{11,2+3,2}.100=77,77\%\)
\(\%m_{CH_4}=100\%-77,77\%=22,23\%\)
b.
\(CH_4+2O_2\rightarrow\left(t^o\right)CO_2+2H_2O\)
0,2 0,4 ( mol )
\(C_2H_4+5O_2\rightarrow\left(t^o\right)2CO_2+2H_2O\)
0,4 2 ( mol )
\(V_{kk}=\left(2+0,4\right).22,4.5=53,76.5=268,8l\)
a) \(n_{CH_4}=\dfrac{3,36}{22,4}=0,15\left(mol\right)\)
=> \(\%V_{CH_4}=\dfrac{3,36}{11,2}.100\%=30\%\)
=> \(\%V_{C_2H_4}=100\%-30\%=70\%\)
b) \(n_{C_2H_4}=\dfrac{11,2.70\%}{22,4}=0,35\left(mol\right)\)
PTHH: CH4 + 2O2 --to--> CO2 + 2H2O
0,15-->0,3
C2H4 + 3O2 --to--> 2CO2 + 2H2O
0,35-->1,05
=> nO2 = 0,3 + 1,05 = 1,35 (mol)
=> VO2 = 1,35.22,4 = 30,24 (l)
a)
PTHH: C2H2+2Br2 --> C2H2Br4
b) \(n_{C_2H_2}=\dfrac{36}{26}=\dfrac{18}{13}\left(mol\right)\)
=> \(V_{C_2H_2}=\dfrac{18}{13}.22,4=\dfrac{2016}{65}\left(l\right)\)
\(n_{CH_4}=\dfrac{42-36}{16}=0,375\left(mol\right)\)
=> \(V_{CH_4}=0,375.22,4=8,4\left(l\right)\)
c) \(\left\{{}\begin{matrix}\%V_{C_2H_2}=\dfrac{\dfrac{2016}{65}}{\dfrac{2016}{65}+8,4}.100\%=78,69\%\\\%V_{CH_4}=\dfrac{8,4}{\dfrac{2016}{65}+8,4}.100\%=21,31\%\end{matrix}\right.\)
Ta có: \(V_{hhsaupư}=V_{CH_4}=\dfrac{44,8}{5,6}=8\left(l\right)\)
\(\Rightarrow\left\{{}\begin{matrix}\%V_{CH_4}=\dfrac{8}{44,8}.100\%\approx17,86\%\\\%V_{C_2H_4}\approx82,14\%\end{matrix}\right.\)
\(m_{bìnhtăng}=m_{anken}=m_{etilen}=1,4g\)
\(\Rightarrow n_{C_2H_4}=\dfrac{1,4}{28}=0,05mol\)
\(n_{hh}=\dfrac{4,48}{22,4}=0,2mol\)
\(\Rightarrow n_{metan}=n_{hh}-n_{eilen}=0,2-0,05=0,15mol\)
\(\%V_{metan}=\dfrac{0,15}{0,2}\cdot100\%=75\%\)
\(\%V_{etilen}=100\%-75\%=25\%\)
\(n_{hh}=\dfrac{11,2}{22,4}=0,5mol\)
\(m_{Br_2}=5,6g\Rightarrow n_{Br_2}=0,035mol\Rightarrow n_{C_2H_4}=0,035mol\)
\(\Rightarrow n_{C_2H_6}=0,5-0,035=0,465mol\)
a)\(\%V_{C_2H_6}=\dfrac{0,465}{0,5}\cdot100\%=93\%\)
\(\%V_{C_2H_4}=100\%-93\%=7\%\)
b)\(V_{Br_2}=\dfrac{0,035}{2}=0,0175l=17,5ml\)
a) mtăng = mC2H4
=> \(n_{C_2H_4}=\dfrac{5,6}{28}=0,2\left(mol\right)\)
=> \(n_{C_2H_6}=\dfrac{11,2}{22,4}-0,2=0,3\left(mol\right)\)
\(\left\{{}\begin{matrix}\%m_{C_2H_6}=\dfrac{0,3.30}{0,3.30+0,2.28}.100\%=61,644\%\\\%m_{C_2H_4}=\dfrac{0,2.28}{0,3.30+0,2.28}.100\%=38,356\%\end{matrix}\right.\)
b)
PTHH: C2H4 + Br2 --> C2H4Br2
0,2--->0,2
=> \(V_{dd.Br_2}=\dfrac{0,2}{2}=0,1\left(l\right)\)