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nC2H5OH=0,5(mol)
V(C2H5OH)=23/0,8=28,75(ml)
=> A=Dr= (28,75/250).100=11,5o
PTHH: C2H5OH + O2 -men giấm---> CH3COOH + H2O
nCH3COOH=C2H5OH=0,5(mol)
=>mCH3COOH=0,5. 60=30(g)
=> m(giấm ăn)= 30/5%=600(g)
=>a=600(g)
a) C2H5OH + O2 --men giấm--> CH3COOH + H2O
b) \(n_{O_2}=\dfrac{6,72}{22,4}=0,3\left(mol\right)\)
PTHH: C2H5OH + O2 --men giấm--> CH3COOH + H2O
0,3<----0,3------------------>0,3
=> \(m_{C_2H_5OH}=0,3.46=13,8\left(g\right)\)
=> \(V_{C_2H_5OH}=\dfrac{13,8}{0,8}=17,25\left(ml\right)\)
=> \(Độ.rượu=\dfrac{17,25}{150}.100=11,5^o\)
c) \(m_{CH_3COOH}=0,3.60=18\left(g\right)\)
a)
$C_6H_{12}O_6 \xrightarrow{t^o,xt} 2CO_2 + 2C_2H_5OH$
720 ml = 720 cm3
m dd glucozo = D.V = 720.1 = 720(gam)
m glucozo = 720.5% = 36(gam)
n glucozo = 36/180 = 0,2(mol)
Theo PTHH :
n C2H5OH = 2n glucozo = 0,4(mol)
m C2H5OH = 0,4.46 = 18,4(gam)
b)
V rượu = m/D = 18,4/0,8 = 23(ml)
Vậy :
Đr = 23/240 .100 = 9,583o
a, \(n_{C_2H_4}=\dfrac{15,68}{22,4}=0,7\left(mol\right)\)
PT: \(C_2H_4+H_2O\underrightarrow{^{t^o,xt}}C_2H_5OH\)
Theo PT: \(n_{C_2H_5OH\left(LT\right)}=n_{C_2H_4}=0,7\left(mol\right)\)
Mà: H = 90%
\(\Rightarrow n_{C_2H_5OH\left(TT\right)}=0,7.90\%=0,63\left(mol\right)\)
\(\Rightarrow m_{C_2H_5OH\left(TT\right)}=0,63.46=28,98\left(g\right)\)
\(\Rightarrow V_{C_2H_5OH}=\dfrac{28,98}{0,8}=36,225\left(ml\right)\)
b, \(C_2H_5OH+O_2\underrightarrow{^{mengiam}}CH_3COOH+H_2O\)
Theo PT: \(n_{CH_3COOH}=n_{C_2H_5OH}=0,63\left(mol\right)\)
\(\Rightarrow m_{CH_3COOH}=0,63.60=37,8\left(g\right)\)
\(\Rightarrow m_{ddCH_3COOH}=\dfrac{37,8}{5\%}=756\left(g\right)\)
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: \(n_{C_2H_5OH}=\dfrac{1}{2}n_{CO_2}=0,8\left(mol\right)\)
\(\Rightarrow a=C\%_{C_2H_5OH}=\dfrac{0,8\cdot46}{50\cdot0,8}\cdot100\%=92\%=92^o\)
\(a,n_{C_6H_{12}O_6}=\dfrac{36}{180}=0,2\left(mol\right)\)
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)
\(c,V_{C_2H_5OH}=\dfrac{9,2}{0,8}=11,5\left(ml\right)\\ \rightarrow V_{ddC_2H_5OH}=\dfrac{11,5.100}{60}=\dfrac{115}{6}\left(ml\right)\)