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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: \(n_{C_2H_5OH}=\dfrac{1}{2}n_{CO_2}=0,8\left(mol\right)\)
\(\Rightarrow a=C\%_{C_2H_5OH}=\dfrac{0,8\cdot46}{50\cdot0,8}\cdot100\%=92\%=92^o\)
\(n_{CaCO_3}=\dfrac{100,2}{100}=1,002\left(mol\right)\)
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: \(\dfrac{29,8075}{30}=96,025^o\)
\(n_{C_2H_5OH}=\dfrac{9,2}{46}=0,2\left(mol\right)\)
\(C_2H_5OH+3O_2\underrightarrow{t^o}2CO_2+2H_2O\)
0,2 0,6 0,4 0,4
\(a,V_{O_2}=0,6.22,4=13,44\left(l\right)\)
\(V_{kk}=13,44.5=67,2\left(l\right)\)
b, \(CO_2+Ca\left(OH\right)_2\rightarrow CaCO_3\downarrow+H_2O\)
0,4 0,4
\(m_{CaCO_3}=0,4.100=40\left(g\right)\)
\(m_{CaCO_3tt}=40.95\%=38\left(g\right)\)
\(n_{CO_2}=\dfrac{4,48}{22,4}=0,2mol\)
\(C_2H_5OH+3O_2\underrightarrow{t^o}2CO_2+3H_2O\)
0,2 0,6 0,4 0,6
a)\(m_{C_2H_5OH}=0,2\cdot46=9,2g\)
b)\(V_{O_2}=0,6\cdot22,4=13,44l\)
\(\Rightarrow V_{kk}=5V_{O_2}=5\cdot13,44=67,2l\)
Câu 1.
\(V_{C_2H_5OH}=\dfrac{90.90}{100}=81\left(ml\right)\)
\(m_{C_2H_5OH}=81.0,8=64,8g\)
\(n_{C_2H_5OH}=\dfrac{64,8}{46}=1,4mol\)
\(2C_2H_5OH+2Na\rightarrow2C_2H_5ONa+H_2\)
1,4 0,7 ( mol )
\(V_{H_2}=0,7.22,4=15,68l\)
Câu 2.
\(n_{CaCO_3}=\dfrac{100}{100}=1mol\)
\(Ca\left(OH\right)_2+CO_2\rightarrow CaCO_3+H_2O\)
1 1 ( mol )
\(C_2H_5OH+3O_2\rightarrow\left(t^o\right)2CO_2+3H_2O\)
0,5 1,5 1 ( mol )
\(V_{kk}=\left(1,5.22,4\right).5=168l\)
\(m_{C_2H_5OH}=0,5.46=23g\)
\(V_{C_2H_5OH}=\dfrac{23}{0,8}=28,75ml\)
Độ rượu = \(\dfrac{28,75}{30}.100=95,83^o\)
\(V_{C_2H_5OH}=\dfrac{20.96}{100}=19,2\left(ml\right)\)
=> \(m_{C_2H_5OH}\) = 19,2.0,8 = 15,36 (g)
=> \(n_{C_2H_5OH}=\dfrac{15,36}{46}=\dfrac{192}{575}\left(mol\right)\)
PTHH: \(C_2H_5OH+3O_2\underrightarrow{t^o}2CO_2+3H_2O\)
Theo PTHH: \(n_{O_2}=\dfrac{576}{575}\left(mol\right)\Rightarrow V_{O_2\left(đktc\right)}=\dfrac{576}{575}.22,4=\dfrac{12902,4}{575}\left(l\right)\)
a, \(C_2H_6O+3O_2\underrightarrow{t^o}2CO_2+3H_2O\)
\(CO_2+Ca\left(OH\right)_2\rightarrow CaCO_3+H_2O\)
Ta có: \(n_{CaCO_3}=\dfrac{14,4}{100}=0,144\left(mol\right)\)
Theo PT: \(n_{CO_2}=n_{CaCO_3}=0,144\left(mol\right)\Rightarrow m_{CO_2}=0,144.44=6,336\left(g\right)\)
b, \(n_{C_2H_6O}=\dfrac{1}{2}n_{CO_2}=0,072\left(mol\right)\)
\(\Rightarrow m_{C_2H_6O}=0,072.46=3,312\left(g\right)\)
\(\Rightarrow V_{C_2H_6O}=\dfrac{3,312}{0,8}=4,14\left(ml\right)\)
Độ rượu = \(\dfrac{4,14}{4,5}.100=92^o\)
Khi tính độ rượu thì mình cần phải ghi thêm % vô nữa hay sao bạn
