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\(a,V_{C_2H_5OH}=\dfrac{10.96}{100}=9,6\left(ml\right)\\ m_{C_2H_5OH}=9,6.0,8=7,68\left(g\right)\\ n_{C_2H_5OH}=\dfrac{7,68}{46}=\dfrac{96}{575}\left(mol\right)\)
PTHH: 2C2H5OH + 2Na ---> 2C2H5ONa + H2
\(\dfrac{96}{575}\)------------------------------------->\(\dfrac{48}{575}\)
\(V_{H_2}=\dfrac{48}{575}.22,4=1,87\left(l\right)\)
\(b,V_{dd}=12+10,6=20,6\left(ml\right)\\ Đ_r=\dfrac{9,6}{20,6}.100=46,6^o\)
\(a,V_{C_2H_5OH}=\dfrac{96.30}{100}=28,8\left(ml\right)\\ \rightarrow m_{C_2H_5OH}=28,8.0,8=23,04\left(ml\right)\\ \rightarrow n_{C_2H_5OH}=\dfrac{23,04}{46}=0,5\left(mol\right)\)
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)
\(nC_2H_5OH=\dfrac{2,9}{46}=0,06\left(mol\right)\)
\(C_2H_5OH+Na\rightarrow C_2H_5ONa+\dfrac{1}{2}H_2\)
0,06 0,06 0,06 0,03 (mol)
VH2 = 0,03.22,4= 0,672 (l)
V = m /D
=> V rượu etylic = 2,9 / 0,8 = 3,625 (ml)
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
\(a,n_{C_6H_{12}O_6}=\dfrac{36}{180}=0,2\left(mol\right)\)
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)
\(c,V_{C_2H_5OH}=\dfrac{9,2}{0,8}=11,5\left(ml\right)\\ \rightarrow V_{ddC_2H_5OH}=\dfrac{11,5.100}{60}=\dfrac{115}{6}\left(ml\right)\)
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 = \(\dfrac{5,75}{14}.100=41^0\)
\(PTHH:2C_2H_5OH+2Na\rightarrow2C_2H_5ONa+H_2\)
\(n_{Na}=\dfrac{m}{M}=\dfrac{4,6}{23}=0,2\left(mol\right)\)
\(\Rightarrow n_{H_2}=0,1\left(mol\right)\)
a) \(V_{H_2}=n.22,4=0,1.22.4=2,24\left(l\right)\)