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a) n glucozo = 54/180 = 0,3(mol)
n glucozo pư = 0,3.80% = 0,24(mol)
$C_6H_{12}O_6 \xrightarrow{t^o} 2CO_2 +2 C_2H_5OH$
n C2H5OH = 2n glucozo = 0,48(mol)
m C2H5OH = 0,48.46 = 22,08(gam)
b)
$C_2H_5OH + O_2 \xrightarrow{men\ giấm} CH_3COOH + H_2O$
n CH3COOH = n C2H5OH = 0,48(mol)
C% CH3COOH = 0,48.60/500 .100% = 5,76%
a)
\(n_{CO_2}=\dfrac{5,6}{22,4}=0,25\left(mol\right)\)
PTHH: C6H12O6 --men rượu--> 2C2H5OH + 2CO2
0,125<---------------------0,25<-------0,25
=> \(m_{C_2H_5OH}=0,25.46=11,5\left(g\right)\)
b) \(m_{C_6H_{12}O_6\left(pư\right)}=0,125.180=22,5\left(g\right)\)
=> \(m_{C_6H_{12}O_6\left(tt\right)}=\dfrac{22,5.100}{80}=28,125\left(g\right)\)
c) \(V_{C_2H_5OH}=\dfrac{11,5}{0,8}=14,375\left(ml\right)\)
=> \(V_{rượu}=\dfrac{14,375.100}{25}=57,5\left(ml\right)\)
\(n_{CO2}=\dfrac{11,2}{22,4}=0,5\left(mol\right)\)
Pt : \(C_6H_{12}O_6\xrightarrow[30-35^oC]{Menrượu}2C_2H_5OH+2CO_2\)
0,5 0,5
a) \(m_{C2H5OH}=0,5.46=23\left(g\right)\)
b) Pt : \(C_2H_5OH+O_2\xrightarrow[]{Mengiấm}CH_3COOH+H_2O\)
0,5 0,5
\(m_{CH3COOH\left(lt\right)}=0,5.60=30\left(g\right)\)
⇒ \(m_{CH3COOH\left(tt\right)}=30.80\%=24\left(g\right)\)
Chúc bạn học tốt
\(C_6H_{12}O_6\underrightarrow{t^o}2C_2H_5OH+2CO_2\uparrow\)(xt : men rượu )
0,5 0,5
\(n_{CO_2}=\dfrac{11,2}{22,4}=0,5\left(mol\right)\)
\(m_{C_2H_5OH}=0,5.46=23\left(g\right)\)
\(C_2H_5OH+O_2\underrightarrow{t^o}CH_3COOH+H_2O\) (men giấm )
0,5 0,5
\(m_{CH_3COOH}=0,5.60=30\left(g\right)\)
\(m_{CH_3COOHtt}=30.80\%=24\left(g\right)\)
a) Khối lượng rượu etylic:
nCO2 = \(\dfrac{11.2}{22.4}\) = 0.5 mol
Phương trình lên men glucozơ:
C6H12O6 → 2C2H5OH + 2CO2.
Theo pt: nrượu etylic = nCO2 = 0,5 mol.
mrượu etylic = 0,5 × 46 = 23g.
b) Khối lượng glucozơ.
Theo phương trình nglucozo = 1/2. nCO2 = 1/2 . 0,5 = 0,25 mol
Do hiệu suất đạt 90% nên khối lượng glucozo cần dùng là: 0,25.180.\(\dfrac{100}{90}\)= 50 (g)
\(n_{C_6H_{12}O_6}=\dfrac{18}{180}=0.1\left(mol\right)\)
\(C_6H_{12}O_6\underrightarrow{mr}2C_2H_5OH+2CO_2\)
\(0.1.....................0.2...............0.2\)
\(n_{CaCO_3}=n_{CO_2}=\dfrac{12.5}{100}=0.125\left(mol\right)\)
\(H\%=\dfrac{0.125}{0.2}\cdot100\%=62.5\%\)
\(n_{C_2H_5OH}=0.125\left(mol\right)\)
\(m_{C_2H_5OH}=0.125\cdot46=5.75\left(g\right)\)
\(a,n_{C_6H_{12}O_6}=\dfrac{36}{180}=0,2\left(mol\right)\)
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)
\(c,V_{C_2H_5OH}=\dfrac{9,2}{0,8}=11,5\left(ml\right)\\ \rightarrow V_{ddC_2H_5OH}=\dfrac{11,5.100}{60}=\dfrac{115}{6}\left(ml\right)\)
\(n_{CO2}=\frac{2,24}{22,4}=0,1\left(mol\right)\)
\(C_6H_{12}O_6\underrightarrow{^{t^o,men.ruoi}}2C_2H_5OH+2CO_2\)
0,05______________0,1_________0,1
Theo PT:
\(n_{C6H12O6}=\frac{1}{2}n_{CO2}=\frac{0,1}{2}=0,05\left(mol\right)\)
\(\Rightarrow m_{C6H12O6}=0,05.180=9\left(g\right)\)
\(\Rightarrow C\%_{glucozo}=\frac{9}{500}.100\%=1,8\%\)
Theo PT:
\(\Rightarrow n_{C2H5OH}=n_{CO2}=0,1\left(mol\right)\)
\(\Rightarrow m_{C2H5OH}=0,1.46=4,6\left(g\right)\)
\(m=D.V\Rightarrow V_{C2H5OH}=\frac{4,6}{0,8}=5,75\left(ml\right)\)