tính thể tích rượu etylic cần dùng để lên men đc 200g axitaxetic 12% biết DRượu = 0,8g/ml cho C=12 O=10 H=1
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\(a,n_{C_6H_{12}O_6}=\dfrac{36}{180}=0,2\left(mol\right)\)
PTHH: \(C_6H_{12}O_6\underrightarrow{\text{men rượu}}2C_2H_5OH+2CO_2\uparrow\)
0,2----------------->0,4----------->0,4
=> VCO2 = 0,4.22,4 = 8,96 (l)
b, mC2H5OH = 0,4.46.50% = 9,2 (g)
\(c,V_{C_2H_5OH}=\dfrac{9,2}{0,8}=11,5\left(ml\right)\\ \rightarrow V_{ddC_2H_5OH}=\dfrac{11,5.100}{60}=\dfrac{115}{6}\left(ml\right)\)
C6H12O6→ 2CO2+ 2C2H5OH
0,1mo l→ 0,2mol →mrượu ng/chất =9,2g →Vng/chất=\(\frac{m}{D}=\frac{9,2}{0,8}=11,5ml\)
Độ rượu=40=\(\frac{Vruou\left(ngchat\right)}{Vdd}\)\(\times100\)→Vdd/thu đk= \(\frac{11,5\times100}{40}=27,85ml\)
\(m_{C_6H_{12}O_6}=10.8\cdot90\%=9.72\left(kg\right)\)
\(n_{C_6H_{12}O_6}=\dfrac{9.72}{180}=0.054\left(kmol\right)\)
\(\Rightarrow n_{C_2H_5OH}=0.054\cdot2=0.108\left(kmol\right)\)
\(n_{C_2H_5OH\left(pư\right)}=0.108\cdot90\%=0.0972\left(kmol\right)\)
\(m_{C_2H_5OH}=0.0972\cdot46=4.4712\left(kg\right)\)
\(V_{C_2H_5OH}=\dfrac{4471.2}{0.8}=5589\left(ml\right)\)
\(V_{hhr}=\dfrac{5589}{0.46}=12150\left(ml\right)\)
\(a) V_{rượu} = 5.\dfrac{10}{100} = 0,5(lít)\\ b) m_{rượu} = D.V = 0,78.0,5.1000 = 390(gam)\\ c) n_{C_2H_5OH\ pư} = \dfrac{380}{46}.80\% = \dfrac{156}{23}(mol)\\ C_2H_5OH + O_2 \xrightarrow{men\ giấm} CH_3COOH + H_2O\\ n_{CH_3COOH} = n_{C_2H_5OH\ pư} = \dfrac{156}{23}(mol)\\ m_{CH_3COOH} = \dfrac{156}{23}.60 = 406,96(gam)\)
Vruou=150.34,5/100=51,75ml
mruou=51,75.0,8=41,4g
n(C2H5OH)=41,4/46=0,9mol
Số mol tinh bột n=0,9/2n=0,45/n mol
Khối lượng tinh bột là m=162n.0,45/n =72,9g
Hiệu suất H=72,9/162.100%=45%
\(V_{C_2H_5OH}=150\cdot0.345=51.75\left(ml\right)\)
\(m_{C_2H_5OH}=51.75\cdot0.8=41.4\left(g\right)\)
\(\Rightarrow n_{C_2H_5OH}=\dfrac{41.4}{46}=0.9\left(ml\right)\)
\(\left(C_6H_{10}O_5\right)_n\rightarrow nC_6H_{12}O_6\rightarrow2nC_2H_5OH\)
\(\dfrac{0.45}{n}.................................0.9\)
\(m_{tb}=\dfrac{0.45}{n}\cdot162n=72.9\left(g\right)\)
\(H\%=\dfrac{72.9}{162}\cdot100\%=45\%\)
Ta có:m(rượu+nước)= 200 x 0,8= 160(g)
m(rượu tinh khiết)= \(\dfrac{160.36,8}{100}=58,58\left(g\right)\)
\(\Rightarrow n_{C_2H_5OH\left(TT\right)}=\dfrac{58,88}{46}=1,28\left(mol\right)\)
\(n_{C_6H_{12}O_6}=\dfrac{138,24}{180}=0,768\left(mol\right)\)
\(PTHH:C_6H_{12}O_6\xrightarrow[30-35^o]{menrượu}2C_2H_5OH+2CO_2\)
Mol: 0,768 1,536
\(\Rightarrow H=\dfrac{1,28.100}{1,536}=83,3\%\)
Ta có:m(rượu+nước)= 150 x 0,8= 120(g)
m(rượu tinh khiết)= 120 x 34,5:100=41,4 (g)
=> \(n_{C_2H_5OH\left(tt\right)}=\dfrac{41,4}{46}=0,9\left(mol\right)\)
\(n_{C_6H_{12}O_6}=\dfrac{162}{180}=0,9\left(mol\right)\)
\(PTHH:C_6H_{12}O_6\xrightarrow[30-35^o]{menrượu}2CO_2+2C_2H_5OH\)
\(n_{C_2H_5OH\left(LT\right)}=0,9.2=1,8\left(mol\right)\)
\(\Rightarrow H=\dfrac{0,9.100}{1,8}=50\%\)
Đổi 10kg = 10000g
Ta có: \(n_{CH_3COOH\left(LT\right)}=\dfrac{10000.5\%}{92\%}=\dfrac{12500}{23}\left(mol\right)\)
PTHH:
\(C_2H_5OH+O_2\xrightarrow[]{\text{men giấm}}CH_3COOH+H_2O\)
\(\dfrac{12500}{23}\)<---------------------\(\dfrac{12500}{23}\)
\(\Rightarrow m_{C_2H_5OH}=\dfrac{12500}{23}.46=25000\left(g\right)=25\left(kg\right)\)
\(C_2H_5OH+O_2\rightarrow\left(men.giấm\right)CH_3COOH+H_2O\\ n_{CH_3COOH}=\dfrac{200.12\%}{60}=0,4\left(mol\right)\\ n_{C_2H_5OH}=n_{CH_3COOH}=0,4\left(mol\right)\\ m_{C_2H_5OH}=0,4.46=18,4\left(g\right)\\ V_{C_2H_5OH}=\dfrac{18,4}{0,8}=23\left(ml\right)\)
Ta có: \(m_{CH_3COOH}=200.12\%=24\left(g\right)\Rightarrow n_{CH_3COOH}=\dfrac{24}{60}=0,4\left(mol\right)\)
PT: \(C_2H_5OH+O_2\underrightarrow{^{mengiam}}CH_3COOH+H_2O\)
Theo PT: \(n_{C_2H_5OH}=n_{CH_3COOH}=0,4\left(mol\right)\)
\(\Rightarrow m_{C_2H_5OH}=0,4.46=18,4\left(g\right)\)
\(\Rightarrow V_{C_2H_5OH}=\dfrac{18,4}{0,8}=23\left(ml\right)\)