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V C 2 H 5 OH = 50.4/100 = 2l
→ m C 2 H 5 OH = 2.1000.0,8 = 1600g
Phương trình hóa học :
C 2 H 5 OH + O 2 → CH 3 COOH + H 2 O
46 gam 60 gam
1600 gam x
x = 1600x60/46
Vì hiệu suất đạt 80% → m CH 3 COOH = 1600.60.80/(46.100) = 1669,6g
→ m giấm = 1669,6/5 x 100 = 33392 (gam) = 33,392 kg
\(C_2H_5OH+O_2\rightarrow\left(men.giấm\right)CH_3COOH+H_2O\\ V_{C_2H_5OH}=25.4\%=1\left(l\right)=1000\left(ml\right)\\ m_{C_2H_5OH}=1000.0,8=800\left(g\right)\\ m_{CH_3COOH\left(LT\right)}=\dfrac{800.60}{46}=\dfrac{48000}{46}\left(g\right)\\ m_{CH_3COOH\left(TT\right)}=\dfrac{48000}{46}:92\%=1134,2155\left(gam\right)\\ m_{ddCH_3COOH}=1135,2155:5\%=22684,31\left(g\right)\)
a)n glucozo = 90/180 = 0,5(kmol)
n glucozo pư = 0,5.70% = 0,35(kmol)
$C_6H_{12}O_6 \xrightarrow{t^o,xt} 2CO_2 + 2C_2H_5OH$
n C2H5OH = 2n glucozo = 0,35.2 = 0,7(kmol)
m C2H5OH = 0,7.46 = 32,2(kg)
b)$(C_6H_{10}O_5)_n + nH_2O \xrightarrow{t^o,xt}nC_6H_{12}O_6$
$C_6H_{12}O_6 \xrightarrow{t^o,xt} 2CO_2 + 2C_2H_5OH$
n tinh bột = 2/162n = 1/81n(kmol)
n glucozo = 80% . n . 1/81n = 4/405(kmol)
n C2H5OH = 80% . 2. 4/405 = 32/2025(kmol)
m C2H5OH = 46.32/2025 = 0,73(kg)
\(n_{C_6H_{12}O_6}=\dfrac{90}{180}=0.5\left(kmol\right)\)
\(n_{C_6H_{12}O_6\left(pư\right)}=0.5\cdot0.7=0.35\left(kmol\right)\)
\(C_6H_{12}O_6\underrightarrow{^{\text{men rượu}}}2C_2H_5OH+2CO_2\)
\(0.35........................0.7\)
\(m_{C_2H_5OH}=0.7\cdot46=32.2\left(kg\right)\)
\(b.\)
\(C_{12}H_{22}O_{11}\underrightarrow{^{t^0,xt}}C_6H_{12}O_6+C_6H_{12}O_6\)
\(C_6H_{12}O_6\underrightarrow{^{\text{men rượu}}}2C_2H_5OH+2CO_2\)
\(n_{C_2H_5OH}=\dfrac{12\cdot n_{C_{12}H_{22}O_{11}}}{2}\cdot80\%=\dfrac{12\cdot\dfrac{1}{171}}{2}\cdot80\%=\dfrac{8}{285}\left(kmol\right)\)
\(m_{C_2H_5OH}=\dfrac{8}{285}\cdot46=1.29\left(kg\right)\)
\(a,C_2H_5OH+O_2\left(men.giấm\right)\rightarrow CH_3COOH+H_2O\\ V_{C_2H_5OH\left(ng.chất\right)}=\dfrac{2,875}{10}=0,2875\left(l\right)=287,5\left(ml\right)\\ m_{C_2H_5OH}=287,5.0,8=230\left(g\right)\\ n_{C_2H_5OH}=\dfrac{230}{46}=5\left(mol\right)\\ n_{CH_3COOH\left(LT\right)}=n_{C_2H_5OH}=5\left(mol\right)\\ n_{CH_3COOH\left(TT\right)}=5.80\%=4\left(mol\right)\\ m_{CH_3COOH\left(TT\right)}=4.60=240\left(g\right)\\ b,m_{dd.giấm}=\dfrac{240.100}{5}=4800\left(gam\right)\)
a.\(V_{C_2H_5OH}=\dfrac{10.8}{100}=0,8ml\)
\(m_{C_2H_5OH}=0,8.0,8=1,6g\)
\(n_{C_2H_5OH}=\dfrac{1,6}{46}=0,034mol\)
\(C_2H_5OH+O_2\rightarrow\left(men.giấm\right)CH_3COOH+H_2O\)
0,034 0,034 ( mol )
\(m_{CH_3COOH}=0,034.60.80\%=1,632g\)
b.\(m_{dd_{CH_3COOH}}=\dfrac{1,632}{5\%}=32,64g\)
\(V_{C_2H_5OH}=\dfrac{50.23}{100}=11,5\left(ml\right)\\ m_{C_2H_5OH}=11,5.0,8=9,2\left(g\right)\\ n_{C_2H_5OH\left(tt\right)}=\dfrac{9,2}{46}=0,2\left(mol\right)\\ n_{C_2H_5OH\left(lt\right)}=\dfrac{0,2}{80\%}=0,25\left(mol\right)\)
PTHH:
\(C_6H_{12}O_6\underrightarrow{\text{men rượu}}2C_2H_5OH+2CO_2\)
0,125 <----------------- 0,25
\(m_{C_6H_{12}O_6}=0,125.180=22,5\left(g\right)\)