C2H4+Br2->C2H4Br2
0,005---0,005
nBr2=0,8\160=0,005 mol
=>%VC2H4=0,005.22,4\2,24.100=5%
=>%VCH4=95%
C2H4+3O2-to>2CO2+2H2O
0,005-------------0,01
CH4+2O2-to->CO2+2H2O
0,095---------------0,095
=>CO2+Ca(OH)2->CaCO3+H2O
....0,105-----------------0,105
=>mCaCO3=0,105.100=10,5g
\(n_{Br2}=\frac{0,8}{160}=0,005\left(mol\right)\)
\(n_{hh}=0,1\left(mol\right)\)
a. \(PTHH:C_2H_4+Br_2\rightarrow C_2H_4Br_2\)
a. Theo PT trên :
\(n_{C2H4}=n_{Br2}=0,005\left(mol\right)\)
\(\Rightarrow\%V_{C2H4}=\frac{0,005}{0,1}.100\%=5\%\)
\(\Rightarrow\%V_{CH4}=100\%-5\%=95\%\)
b. \(n_{CH4}=0,1-0,005=0,095\left(mol\right)\)
\(CH_4+2O_2\underrightarrow{^{to}}CO_2+2H_2O\)
0,095___________0,095________ (mol)
\(C_2H_4+3O_2\underrightarrow{^{to}}2CO_2+2H_2O\)
0,005 __________ 0,01 ___________ (mol)
\(\Rightarrow n_{CO2}=0,095+0,01=0,105\left(mol\right)\)
\(CO_2+Ca\left(OH\right)_2\rightarrow CaCO_3+H_2O\)
0,105______________0,105 _______ (mol)
\(\Rightarrow m_{CaCO3}=0,105.100=10,5\left(g\right)\)