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![](https://rs.olm.vn/images/avt/0.png?1311)
\(a,V_{C_2H_5OH}=\dfrac{10.96}{100}=9,6\left(ml\right)\\ m_{C_2H_5OH}=9,6.0,8=7,68\left(g\right)\\ n_{C_2H_5OH}=\dfrac{7,68}{46}=\dfrac{96}{575}\left(mol\right)\)
PTHH: 2C2H5OH + 2Na ---> 2C2H5ONa + H2
\(\dfrac{96}{575}\)------------------------------------->\(\dfrac{48}{575}\)
\(V_{H_2}=\dfrac{48}{575}.22,4=1,87\left(l\right)\)
\(b,V_{dd}=12+10,6=20,6\left(ml\right)\\ Đ_r=\dfrac{9,6}{20,6}.100=46,6^o\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(a,V_{C_2H_5OH}=\dfrac{96.30}{100}=28,8\left(ml\right)\\ \rightarrow m_{C_2H_5OH}=28,8.0,8=23,04\left(ml\right)\\ \rightarrow n_{C_2H_5OH}=\dfrac{23,04}{46}=0,5\left(mol\right)\)
PTHH: 2C2H5OH + 2Na ---> 2C2H5ONa + H2
0,5----------------------------------->0,25
\(\rightarrow V_{H_2}=0,25.22,4=5,6\left(l\right)\)
b, \(n_{CH_3COOH}=\dfrac{36}{60}=0,6\left(mol\right)\)
PTHH: \(C_2H_5OH+CH_3COOH\xrightarrow[t^o]{H_2SO_{4\left(đ\right)}}CH_3COOC_2H_5+H_2O\)
LTL: 0,5 < 0,6 => CH3COOH dư
Theo pthh: nCH3COOH = nC2H5OH = 0,5 (mol)
=> meste = 0,5.88.70% = 30,8 (g)
![](https://rs.olm.vn/images/avt/0.png?1311)
Đặt:
nC2H5OH= x mol
nCH3COOH= y mol
mhh= 46x + 60y= 7.6g (1)
nH2= 1.68/22.4=0.075 mol
C2H5OH + Na --> C2H5ONa + 1/2H2
x___________________________0.5x
CH3COOH + Na --> CH3COONa + 1/2H2
y______________________________0.5y
nH2= 0.5x + 0.5y= 0.075 mol (2)
Giải (1) và (2):
x= 0.1
y= 0.05
mC2H5OH= 4.6g
mCH3COOH= 3g
2/ VC2H5OH= 10*96/100=9.6ml
VH2O= Vhh- Vr= 10-9.6=0.4 g
mH2O= 0.4g
nH2O= 1/45 mol
mC2H5OH= 9.6*0.8=7.68g
nC2H5OH= 0.16 mol
C2H5OH + Na --> C2H5ONa + 1/2H2
0.167_________________________0.0835
Na + H2O --> NaOH + 1/2H2
______1/45___________1/90
nH2= 0.0835+1/90=0.095 mol
VH2= 22.128l
![](https://rs.olm.vn/images/avt/0.png?1311)
a) \(V_r=\frac{Đ_r.V_{hh}}{100}=\frac{92.25}{100}=13,8\left(ml\right)\)
\(m_r=d.V=0,8.13,8=11,04\left(g\right)\)
b) PTHH :\(2C_2H_5OH+2Na\rightarrow2C_2H_5ONa+H_2\uparrow\)
Theo PT: \(n_{H_2}=\frac{1}{2}n_{C_2H_5OH}=\frac{1}{2}.\frac{11,04}{46}=0,12\left(mol\right)\)
\(\Rightarrow V_{H_2}=0,12.22,4=2,688\left(l\right)\)
![](https://rs.olm.vn/images/avt/0.png?1311)
ta có : n(etanol) = 0,1(mol)
PTHH :
\(2C2H5OH+2Na->2C2H5ONa+H2\uparrow\)
0,1mol...........................................................0,05mol
a) VH2(đktc) = 0,05.22,4 = 1,12(l)
b) Ta có : V(rượu) = 4,6/0,8 = 5,75(ml)
c) ta có
V(dd rượu) = 5,75 + 8,25 = 14(ml)
=> độ rượu = \(\dfrac{5,75}{14}.100=41^0\)