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\(a,V_{C_2H_5OH}=\dfrac{96.30}{100}=28,8\left(ml\right)\\ \rightarrow m_{C_2H_5OH}=28,8.0,8=23,04\left(ml\right)\\ \rightarrow n_{C_2H_5OH}=\dfrac{23,04}{46}=0,5\left(mol\right)\)
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)
n C2H5OH =a (mol) ; n CH3COOH = b(mol)
=> 46a + 60b = 27,2(1)
$2C_2H_5ONa + 2Na \to 2C_2H_5ONa + H_2$
$2CH_3COOH + 2Na \to 2CH_3COONa + H_2$
Theo PTHH :
n H2 = 0,5a + 0,5b = 5,6/22,4 = 0,25(2)
Từ (1)(2) suy ra a = 0,2 ; b = 0,3
Suy ra:
m C2H5OH = 0,2.46 = 9,2(gam)
m CH3COOH = 0,3.60 = 18(gam)
2C2H5OH + 2Na--> 2C2H5Na + H2
a a/2 mol
2CH3COOH + 2Na --> 2CH3COONa + H2
b b/2 mol
n khí = 3,36/22,4=0,15 mol
=> a/2 + b/2 =0,15
và 46a + 60 b =15,2
=> a=0,2 mol : b=0,1 mol
=> mC2H5OH = 0,2 * 46=9,2 g
=>% mC2H5OH = 9,2*100/15,2=60,53%
% mCH3COOH = 100 - 60 ,53=39,47 %
\(a,V_{C_2H_5OH}=\dfrac{10.96}{100}=9,6\left(ml\right)\\ m_{C_2H_5OH}=9,6.0,8=7,68\left(g\right)\\ n_{C_2H_5OH}=\dfrac{7,68}{46}=\dfrac{96}{575}\left(mol\right)\)
PTHH: 2C2H5OH + 2Na ---> 2C2H5ONa + H2
\(\dfrac{96}{575}\)------------------------------------->\(\dfrac{48}{575}\)
\(V_{H_2}=\dfrac{48}{575}.22,4=1,87\left(l\right)\)
\(b,V_{dd}=12+10,6=20,6\left(ml\right)\\ Đ_r=\dfrac{9,6}{20,6}.100=46,6^o\)
- Đặt \(\left\{{}\begin{matrix}n_{C_2H_5OH}=a\left(mol\right)\\n_{CH_3COOH}=b\left(mol\right)\end{matrix}\right.\) \(\Rightarrow46a+60b=33,2\left(1\right)\)
\(n_{H_2}=\dfrac{V}{22,4}=\dfrac{6,72}{22,4}=0,3\left(mol\right)\)
a) \(2C_2H_5OH+2Na\rightarrow2C_2H_5ONa+H_2\)
2 2 1 (mol)
a a a/2 (mol)
\(2CH_3COOH+2Na\rightarrow2CH_3COONa+H_2\)
2 2 1 (mol)
b b b/2 (mol)
Từ hai PTHH trên ta có: \(\dfrac{a}{2}+\dfrac{b}{2}=n_{H_2}=0,3\Rightarrow a+b=0,6\left(2\right)\)
(1), (2) ta có hệ phương trình: \(\left\{{}\begin{matrix}46a+60b=33,2\\a+b=0,6\end{matrix}\right.\)
Giải ra ta được: \(a=0,2\left(mol\right);b=0,4\left(mol\right)\)
b) \(m_{C_2H_5OH}=n.M=0,2\times46=9,2\left(g\right)\)
\(m_{CH_3COOH}=n.M=0,4\times60=24\left(g\right)\)
c) \(m_{C_2H_5ONa}=n.M=0,2\times68=13,6\left(g\right)\)
\(m_{CH_3COONa}=n.M=0,4\times82=32,8\left(g\right)\)
a)
C2H5OH + Na → C2H5ONa + 1/2 H2
CH3COOH + Na → CH3COONa + 1/2 H2
b)
Theo PTHH :
n C2H5OH = a(mol) ; n CH3COOH = b(mol)
=> 46a + 60b = 12,9(1)
n H2 = 0,5a + 0,5b = 2,8/22,5 = 0,125(2)
Từ (1)(2) suy ra a = 0,15 ; b = 0,1
%m C2H5OH = 0,15.46/12,9 .100% = 53,49%
%m CH3COOH = 100% -53,49% = 46,51%
b)
n C2H5ONa = a = 0,15 mol
n CH3COONa = b = 0,1(mol)
=> m muối = 0,15.69 + 0,1.82 = 18,55 gam
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