Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
a)
A là Clo
B là SO2
C là H2S
D là NH3
E là CO2
PTHH: \(MnO_2+4HCl_{\left(đ\right)}\rightarrow MnCl_2+Cl_2\uparrow+2H_2O\)
\(Na_2SO_3+H_2SO_4\rightarrow Na_2SO_4+H_2O+SO_2\uparrow\)
\(FeS+2HCl\rightarrow FeCl_2+H_2S\uparrow\)
\(NH_4HCO_3+2NaOH\rightarrow Na_2CO_3+NH_3\uparrow+2H_2O\)
\(Na_2CO_3+H_2SO_4\rightarrow Na_2SO_4+H_2O+CO_2\uparrow\)
b)
\(4Cl_2+H_2S+4H_2O\rightarrow H_2SO_4+8HCl\)
\(Cl_2+SO_2+2H_2O\rightarrow2HCl+H_2SO_4\)
\(SO_2+2H_2S\rightarrow3S\downarrow+2H_2O\)
\(Cl_2+2NaOH\rightarrow NaCl+NaClO+H_2O\)
\(CO_2+2NaOH_{\left(dư\right)}\rightarrow Na_2CO_3+H_2O\)
a) C2H4 + Br2 --> C2H4Br2
C2H2 + 2Br2 --> C2H2Br4
b) Gọi số mol C2H4, C2H2 là a, b (mol)
=> a + b = \(\dfrac{1,68}{22,4}=0,075\left(mol\right)\) (1)
\(n_{Br_2}=\dfrac{16}{160}=0,1\left(mol\right)\)
=> a + 2b = 0,1 (2)
(1)(2) => a = 0,05 (mol); b = 0,025 (mol)
=> \(\left\{{}\begin{matrix}\%V_{C_2H_4}=\dfrac{0,05}{0,075}.100\%=66,67\%\\\%V_{C_2H_2}=\dfrac{0,025}{0,075}.100\%=33,33\%\end{matrix}\right.\)
c)
PTHH: C2H4 + 3O2 --to--> 2CO2 + 2H2O
0,05--->0,15
2C2H2 + 5O2 --to--> 4CO2 + 2H2O
0,025-->0,0625
=> VO2 = (0,15 + 0,0625).22,4 = 4,76 (l)
a.b.\(n_{Br_2}=\dfrac{16}{160}=0,1mol\)
\(n_{hh}=\dfrac{1,68}{22,4}=0,075mol\)
Gọi \(\left\{{}\begin{matrix}n_{C_2H_2}=x\\n_{C_2H_4}=y\end{matrix}\right.\)
\(C_2H_2+2Br_2\rightarrow C_2H_2Br_4\)
x 2x ( mol )
\(C_2H_4+Br_2\rightarrow C_2H_4Br_2\)
y y ( mol )
Ta có:
\(\left\{{}\begin{matrix}22,4x+22,4y=1,68\\2x+y=0,1\end{matrix}\right.\) \(\Leftrightarrow\left\{{}\begin{matrix}x=0,025\\y=0,05\end{matrix}\right.\)
\(\%V_{C_2H_2}=\dfrac{0,025}{0,075}.100=33,33\%\)
\(\%V_{C_2H_4}=100\%-33,33\%=66,67\%\)
c.
\(2C_2H_2+5O_2\rightarrow\left(t^o\right)4CO_2+2H_2O\)
0,025 0,0625 ( mol )
\(C_2H_4+3O_2\rightarrow\left(t^o\right)2CO_2+2H_2O\)
0,05 0,15 ( mol )
\(V_{O_2}=\left(0,0625+0,15\right).22,4=4,76l\)
Đáp án B