% khối lượng CH 3 COOH : 1,2/1,66 x 100% = 72,29%

% khối lương  C 2 H 5 OH : 0,46/1,66 x 100% = 27,71%

\(a,n_{NaOH}=1,5.0,2=0,3\left(mol\right)\\ n_{H_2}=\dfrac{5,6}{22,4}=0,25\left(mol\right)\)

PTHH: 

CH₃COOH + NaOH ---> CH₃COONa + H₂O

0,3<-----------0,3

2CH₃COOH + 2Na ---> 2CH₃COONa + H₂

0,3----------------------------------------------->0,15

2C₂H₅OH + 2Na ---> 2C₂H₅ONa + H₂

0,2<---------------------------------------0,1

=> m = 0,2.46  +0,3.60 = 27,2 (g)

b) \(\left\{{}\begin{matrix}\%m_{CH_3COOH}=\dfrac{0,3.60}{27,2}.100\%=66,18\%\\\%m_{C_2H_5OH}=100\%-66,18\%=33,82\%\end{matrix}\right.\)

a.b.\(n_{CO_2}=\dfrac{5,6}{22,4}=0,25mol\)

\(2CH_3COOH+Na_2CO_3\rightarrow2CH_3COONa+CO_2+H_2O\)

       0,5                                                              0,25               ( mol )

\(m_{CH_3COOH}=0,5.60=30g\)

\(\%m_{CH_3COOH}=\dfrac{30}{45}.100=66,67\%\)

\(\%m_{C_2H_5OH}=100\%-66,67\%=33,33\%\)

c.\(m_{NaOH}=50.20\%=10g\)

\(n_{NaOH}=\dfrac{10}{40}=0,25mol\)

\(2NaOH+CO_2\rightarrow Na_2CO_3+H_2O\)

 \(\dfrac{0,25}{2}\)   <    \(\dfrac{0,25}{1}\)                                ( mol )

 0,25                           0,125                    ( mol )

\(m_{Na_2CO_3}=0,125.106=13,25g\)

a) 

2CH₃COOH + Na₂CO₃ --> 2CH₃COONa + CO₂ + H₂O

b) \(n_{CO_2}=\dfrac{5,6}{22,4}=0,25\left(mol\right)\)

PTHH: 2CH₃COOH + Na₂CO₃ --> 2CH₃COONa + CO₂ + H₂O

                  0,5<-----------------------------------0,25

=> m_CH3COOH = 0,5.60 = 30 (g)

=> m_C2H5OH = 45 - 30 = 15 (g)

c) \(n_{NaOH}=\dfrac{50.20\%}{40}=0,25\left(mol\right)\)

Xét tỉ lệ: \(\dfrac{n_{NaOH}}{n_{CO_2}}=\dfrac{0,25}{0,25}=1\) => Tạo muối NaHCO₃

PTHH: NaOH + CO₂ --> NaHCO₃

              0,25-------------->0,25

=> m_NaHCO3 = 0,25.84 = 21 (g)

\(n_{H_2}=\dfrac{8,96}{22,4}=0,4\left(mol\right)\)

PTHH: Fe + H₂SO₄ → FeSO₄ + H₂

Mol:     0,4                                         0,4

\(m_{Fe}=0,4.56=22,4\left(g\right)\)

\(m_{hh}=22,4+5=27,4\left(g\right)\)

\(\%m_{Fe}=\dfrac{22,4.100\%}{27,4}=81,75\%;\%m_{Cu}=100-81,75=18,25\%\)

Rượu etylic \(C_2H_5OH\)

Axit axetic \(CH_3COOH\)

\(n_{CO_2}=\dfrac{2,24}{22,4}=0,1mol\)

\(2CH_3COOH+Na_2CO_3\rightarrow2CH_3COONa+H_2O+CO_2\uparrow\)

      0,2                  0,1                 0,2                  0,1         0,1

\(\%m_{CH_3COOH}=\dfrac{0,2\cdot60}{39,6}\cdot100\%=30,3\%\)      

\(\%m_{C_2H_5OH}=100\%-30,3\%=69,7\%\)

a)

\(n_{CO_2}=\dfrac{2,24}{22,4}=0,1\left(mol\right)\)

PTHH: 2CH₃COOH + Na₂CO₃ --> 2CH₃COONa + CO₂ + H₂O

                 0,2<----------0,1<-------------0,2<-------0,1

=> \(m_{CH_3COOH}=0,2.60=12\left(g\right)\)

\(\%m_{CH_3COOH}=\dfrac{12}{39,6}.100\%=30,3\%\)

\(\%m_{C_2H_5OH}=\dfrac{39,6-12}{39,6}.100\%=69,7\%\)

b) dd sau pư chứa \(\left\{{}\begin{matrix}CH_3COONa:0,2\left(mol\right)\\C_2H_5OH:\dfrac{39,6-12}{46}=0,6\left(mol\right)\end{matrix}\right.\)

\(V_{dd}=\dfrac{0,1}{2}=0,05\left(l\right)\)

=> \(\left\{{}\begin{matrix}C_{M\left(CH_3COONa\right)}=\dfrac{0,2}{0,05}=4M\\C_{M\left(C_2H_5OH\right)}=\dfrac{0,6}{0,05}=12M\end{matrix}\right.\)

a, \(Zn+2CH_3COOH\rightarrow\left(CH_3COO\right)_2Zn+H_2\)

\(ZnO+2CH_3COOH\rightarrow\left(CH_3COO\right)_2Zn+H_2O\)

b, Ta có: \(n_{H_2}=\dfrac{2,24}{22,4}=0,1\left(mol\right)\)

Theo PT: \(n_{Zn}=n_{H_2}=0,1\left(mol\right)\)

\(\Rightarrow\left\{{}\begin{matrix}\%m_{Zn}=\dfrac{0,1.65}{14,6}.100\%\approx44,52\%\\\%m_{ZnO}\approx55,48\%\end{matrix}\right.\)

c, Ta có: \(n_{ZnO}=\dfrac{14,6-0,1.65}{81}=0,1\left(mol\right)\)

Theo PT: \(n_{CH_3COOH}=2n_{Zn}+2n_{ZnO}=0,4\left(mol\right)\)

PT: \(C_2H_5OH+O_2\underrightarrow{^{mengiam}}CH_3COOH+H_2O\)

Theo PT: \(n_{C_2H_5OH\left(LT\right)}=n_{CH_3COOH}=0,4\left(mol\right)\)

Mà: H = 80%

\(\Rightarrow n_{C_2H_5OH\left(TT\right)}=\dfrac{0,4}{80\%}=0,5\left(mol\right)\)

\(\Rightarrow m_{C_2H_5OH\left(TT\right)}=0,5.46=23\left(g\right)\)

\(\Rightarrow V_{C_2H_5OH}=\dfrac{23}{0,8}=28,75\left(ml\right)\)

\(\Rightarrow V_{C_2H_5OH\left(18,4^o\right)}=\dfrac{28,75}{18,4}.100=156,25\left(ml\right)=0,15625\left(l\right)\)

$a\big)$

$Zn+2CH_3COOH\to (CH_3COO)_2Zn+H_2$

$ZnO+2CH_3COOH\to (CH_2COO)_2Zn+H_2O$

Theo PT: $n_{Zn}=n_{H_2}=\frac{4,48}{22,4}=0,2(mol)$

$\to \%m_{Zn}=\frac{0,2.65}{21,1}.100\%\approx 61,61\%$

$\to \%m_{ZnO}=100-61,61=38,39\%$

$b\big)$

$n_{ZnO}=\frac{21,1-0,2.65}{81}=0,1(mol)$

Theo PT: $\sum n_{CH_3COOH}=2n_{Zn}+2n_{ZnO}=0,6(mol)$

$\to C_{M_{CH_3COOH}}=\dfrac{0,6}{\frac{200}{1000}}=3M$

\(n_{H_2}=\dfrac{4,48}{22,4}=0,2mol\)

\(Zn+2CH_3COOH\rightarrow\left(CH_3COO\right)_2Zn+H_2\)

 0,2                                                                0,2     ( mol )

\(m_{Zn}=0,2.65=13g\)

\(\%m_{Zn}=\dfrac{13}{21,1}.100=61,61\%\)

\(\%m_{ZnO}=100\%-61,61\%=38,39\%\)

\(Zn+2CH_3COOH\rightarrow\left(CH_3COO\right)_2Zn+H_2\)

0,2               0,4                                                  ( mol )

\(n_{ZnO}=\dfrac{21,1-13}{81}=0,1mol\)

\(ZnO+2CH_3COOH\rightarrow\left(CH_3COO\right)_2Zn+H_2O\)

 0,1              0,2                                                        ( mol )

\(C_{M\left(CH_3COOH\right)}=\dfrac{0,4+0,2}{0,2}=3M\)