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\(n_{C_2H_4}=\dfrac{11,2}{22,4}=0,5\left(mol\right)\\ C_2H_4+3O_2\rightarrow\left(t^o\right)2CO_2+2H_2O\\ n_{CO_2}=2.n_{C_2H_4}=2.0,5=1\left(mol\right)\\ CO_2+Ca\left(OH\right)_2\rightarrow CaCO_3+H_2O\\ n_{CaCO_3}=n_{CO_2}=1\left(mol\right)\\ m_{kết.tủa}=m_{CaCO_3}=100.1=100\left(g\right)\\ n_{O_2}=3.n_{C_2H_4}=3.0,5=1,5\left(mol\right)\\ V_{kk}=\dfrac{100}{20}.V_{O_2\left(đktc\right)}=5.\left(1,5.22,4\right)=168\left(lít\right)\)
\(n_{CaCO_3}=\dfrac{100,2}{100}=1,002\left(mol\right)\)
PTHH: Ca(OH)2 + CO2 ---> CaCO3 + H2O
1,002 <---- 1,002
C2H5OH + 3O2 --to--> 2CO2 + 3H2O
0,501 <-------------------- 1,002
\(\rightarrow m_{C_2H_5OH}=0,501.46=23,046\left(g\right)\\ \rightarrow V_{C_2H_5OH}=\dfrac{23,046}{0,8}=28,8075\left(ml\right)\)
=> Độ rượu là: \(\dfrac{29,8075}{30}=96,025^o\)
PTHH: \(C_2H_5OH+3O_2\xrightarrow[]{t^o}2CO_2+3H_2O_{ }\)
\(CO_2+Ca\left(OH\right)_2\rightarrow CaCO_3\downarrow+H_2O\)
a) Ta có: \(n_{CaCO_3}=\dfrac{160}{100}=1,6\left(mol\right)=n_{CO_2}\) \(\Rightarrow n_{O_2}=2,4\left(mol\right)\)
\(\Rightarrow V_{kk}=\dfrac{2,4\cdot22,4}{20\%}=268,8\left(l\right)\)
b) Theo PTHH: \(n_{C_2H_5OH}=\dfrac{1}{2}n_{CO_2}=0,8\left(mol\right)\)
\(\Rightarrow a=C\%_{C_2H_5OH}=\dfrac{0,8\cdot46}{50\cdot0,8}\cdot100\%=92\%=92^o\)
a, \(n_{C_2H_4}=\dfrac{1,12}{22,4}=0,05\left(mol\right)\)
PT: \(C_2H_4+3O_2\underrightarrow{t^o}2CO_2+2H_2O\)
\(CO_2+Ca\left(OH\right)_2\rightarrow CaCO_{3\downarrow}+H_2O\)
Theo PT: \(n_{CaCO_3}=n_{CO_2}=2n_{C_2H_4}=0,1\left(mol\right)\)
\(\Rightarrow m_{CaCO_3}=0,1.100=10\left(g\right)\)
b, Theo PT: \(n_{O_2}=3n_{C_2H_4}=0,15\left(mol\right)\Rightarrow V_{O_2}=0,15.22,4=3,36\left(l\right)\)
\(\Rightarrow V_{kk}=\dfrac{V_{O_2}}{20\%}=16,8\left(l\right)\)
nC2H4 = 8.4/0.3 (mol)
C2H4 + 3O2 -to-> 2CO2 + 2H2O
0.3_____0.9______0.6
VO2 = 0.9*22.4 = 20.16 (l)
Ca(OH)2 + CO2 => CaCO3 + H2O
__________0.6______0.6
mCaCO3 = 0.6*100 = 60 (g)
\(n_{CaCO_3}=\dfrac{100}{100}=1mol\)
\(CO_2+Ca\left(OH\right)_2\rightarrow CaCO_3+H_2O\)
1 1 ( mol )
\(C_2H_5OH+3O_2\rightarrow\left(t^o\right)2CO_2+3H_2O\)
0,5 1 ( mol )
\(V_{C_2H_5OH}=\dfrac{0,5.46}{0,8}=28,75ml\)
Độ rượu = \(\dfrac{28,75}{30}.100=95,83độ\)
tham khảo
Theo PT , nC2H5OH = 1/2 nCO2 = 0,5 mol
⇒ mC2H5OH = 0,5.46 = 23 gam
⇒ V C2H5OH = 23/0,8 = 28,75 ml
⇒ Độ rượu : Đr = 28,75/30.100 = 96 độ
a)
$C_2H_5OH + 3O_2 \xrightarrow{t^o} 2CO_2 + 3H_2O$
$CO_2 + Ca(OH)_2 \xrightarrow{t^o} CaCO_3 + H_2O$
Theo PTHH :
$n_{CO_2} = n_{CaCO_3} = \dfrac{167}{100} = 1,67(mol)$
$n_{C_2H_5OH} = \dfrac{1}{2}n_{CO_2} = 0,835(mol)$
$m_{C_2H_5OH} = 0,835.46 = 38,41(gam)$
$V_{C_2H_5OH} = \dfrac{m}{D} = \dfrac{38,41}{0,8} = 48,0125(ml)$
Độ rượu $= \dfrac{48,0125}{60}.100 = 80,03^o$
b) $n_{O_2} = \dfrac{3}{2}n_{CO_2} = 2,505(mol)$
$V_{O_2} = 2,505.22,4 = 56,112(lít)$
$V_{kk} = 5V_{O_2} = 280,56(lít)$