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

\(CH_3COOH+Na\rightarrow CH_3COONa+\dfrac{1}{2}H_2\)

 0,1                                0,1

\(C_2H_5OH+Na\rightarrow C_2H_5ONa+\dfrac{1}{2}H_2\)

0,1                           0,1

Theo pthh có: \(n_A=2nH_2=2.0,1=0,2\left(mol\right)\)

Gọi x, y là số mol của rượu và axit có trong hh A.

có hệ: \(\left\{{}\begin{matrix}x+y=0,2\\60x+46y=10,6\end{matrix}\right.\)

=> x = y = 0,1

=> \(\left\{{}\begin{matrix}\%_{m_{CH_3COOH}}=\dfrac{60.0,1.100}{10,6}=56,6\%\\\%_{m_{C_2H_5OH}}=100-56,6=43,4\%\end{matrix}\right.\)

\(m_{muối}=m_{CH_3COONa}+m_{C_2H_5ONa}=82.0,1+68.0,1=15\left(g\right)\)

\(Đặt:n_{C_2H_5OH}=a\left(mol\right);n_{CH_3COOH}=b\left(mol\right)\left(a,b>0\right)\\ a,PTHH:C_2H_5OH+Na\rightarrow C_2H_5ONa+\dfrac{1}{2}H_2\\ CH_3COOH+Na\rightarrow CH_3COONa+\dfrac{1}{2}H_2\\ n_{H_2\left(tổng\right)}=\dfrac{2,24}{22,4}=0,1\left(mol\right)\\ b,Ta.lập.hpt:\left\{{}\begin{matrix}46a+60b=10,6\\0,5a+0,5b=0,1\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}a=0,1\\b=0,1\end{matrix}\right.\\ \%m_{C_2H_5OH}=\dfrac{0,1.46}{10,6}.100\approx43,396\%\\\Rightarrow\%m_{CH_3COOH}\approx100\%-43,396\%\approx56,604\%\)

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

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 %

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)

nH2= 0,12 mol

Fe + 2HCl = FeCl2 + H2 

=> nFe = nH2 = 0,12 mol

=> mFe = 0,12*56 = 6,72 gam

=%Fe = (6,72*100%):10 = 67,2%
=> % Cu = 100% -67,2% = 32,8%