nKOH = 0,5.0,3 = 0,15 mol 

CH3COOH + KOH → CH3COOK + H2O

   0,15            0,15         0,15                   mol

a) C_{M CH3COOH} = 0,15/0,2 =0,75M

b) Thể tích của dung dịch thu được sau phản ứng: 500 ml

C_{M CH3COOK} = 0,15/0,5 = 0,3M

c) Phản ứng lên men giấm

C2H5OH + O2 → CH3COOH + H2O

0,15                          0,15

→ mC2H5OH = 0,15.46 = 6,9 gam

\(n_{KOH}=0,5\cdot0,3=0,15mol\)

\(CH_3COOH+KOH\rightarrow CH_3COOK+H_2O\)

0,15                     0,15          0,15            0,15

a)\(C_{M_{CH_3COOH}}=\dfrac{0,15}{0,2}=0,75M\)

b)\(C_{M_{CH_3COOK}}=\dfrac{0,15}{0,2+0,3}=0,3M\)

\(a,m_{Na_2CO_3}=\dfrac{500.20}{100}=100\left(g\right)\\ \rightarrow n_{Na_2CO_3}=\dfrac{100}{106}=\dfrac{50}{53}\left(mol\right)\)

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

              \(\dfrac{50}{53}\)------->\(\dfrac{100}{53}\)--------------->\(\dfrac{100}{53}\)-------------->\(\dfrac{50}{53}\)

\(b,m_{axit}=\dfrac{100}{53}.60=\dfrac{6000}{53}\left(g\right)\\ c,m_{dd}=500+400-\dfrac{50}{53}.44=\dfrac{45500}{53}\left(g\right)\\ m_{CH_3COONa}=\dfrac{100}{53}.82=\dfrac{8200}{53}\left(g\right)\\ \rightarrow C\%_{CH_3COONa}=\dfrac{\dfrac{8200}{23}}{\dfrac{45500}{23}}.100\%=18,02\%\)

\(n_{Zn}=\dfrac{3,25}{65}=0,05\left(mol\right)\)

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

0,05          0,1                        0,05                0,05  ( mol )

\(V_{H_2}=0,05.22,4=1,12\left(l\right)\)

\(m_{dd_{CH_3COOH}}=\dfrac{0,1.60.100}{20}=30\left(g\right)\)

\(m_{ddspứ}=3,25+30-0,05.2=33,15\left(g\right)\)

\(C\%_{\left(CH_3COO\right)_2Zn}=\dfrac{0,05.183}{33,15}.100=27,6\%\)

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

b, Phần này đề hỏi tính khối lượng gì bạn nhỉ?

c, \(n_{Zn}=\dfrac{32,5}{65}=0,5\left(mol\right)\)

Theo PT: \(n_{CH_3COOH}=2n_{Zn}=1\left(mol\right)\)

\(\Rightarrow m_{ddCH_3COOH}=\dfrac{1.60}{36\%}=\dfrac{500}{3}\left(g\right)\)

$a\big)$

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

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

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 )

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

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

\(Mg+2CH_3COOH\rightarrow\left(CH_3COO\right)_2Mg+H_2\)

0,1         0,2

a. \(V_{CH_3COOH}=\dfrac{0,2}{1}=0,2\left(l\right)\)

b. \(CH_3COOH+C_2H_5OH⇌\left(H_2SO_{4đ},t^o\right)CH_3COOC_2H_5+H_2O\)

          0,2                                                             0,2

Với H% = 80

\(m_{CH_3COOC_2H_5}=\dfrac{0,2.88.80}{100}=14,08\left(g\right)\)

\(a) C_2H_5OH + CH_3COOH \buildrel{{H_2SO_4}}\over\rightleftharpoons CH_3COOC_2H_5 + H_2O\\ b) n_{CH_3COOH} = n_{C_2H_5OH} = \dfrac{9,2}{46} = 0,2(mol)\\ m_{CH_3COOH} = 0,2.60 = 12(gam)\\ c) n_{CH_3COOC_2H_5} = n_{C_2H_5OH} = 0,2(mol)\\ m_{CH_3COOC_2H_5} = 0,2.88 = 17,6(gam)\)

Sửa đề: Tính khối lượng dung dich Axit được lấy dùng cho phản ứng.

\(a)\)\(PTHH:\)

\(Mg+2CH_3COOH--->(CH_3COO)_2Mg+H_2\)

\(b)\)

\(nMg=0,3(mol)\)

Theo PTHH: \(nCH_3COOH=0,6(mol)\)

Khối lượng axit tham gia phản ứng :

\(\Rightarrow mCH_3COOH=0,6.60=36\left(g\right)\)

Khối lượng dung dich axit được lấy dùng cho phản ứng

\(\Rightarrow m_{ddCH_3COOH}=\dfrac{36.100}{12}=300\left(g\right)_{ }\)

\(c)\)

Dung dich muối thu được sau phản ứng là \((CH_3COO)_2Mg\)

Theo PTHH: \(n(CH_3COO)_2Mg=0,3(mol)\)

\(\Rightarrow m\left(CH_3COO\right)_2Mg=42,6\left(g\right)\)

\(nH_2 =nMg=0,3(mol)\)

\(\Rightarrow mMg=7,2\left(g\right)\)

Ta có: \(m ddsau=mMg+mddCH_3COOH-mH_2\)

\(\Leftrightarrow mddsau=7,2+300-7,2=300\left(g\right)\)

Nồng độ phần trăm của dung dịch muối thu được sau phản ứng

\(C\%_{\left(CH_3COO\right)_2Mg}=\dfrac{42,6.100}{300}=14,2\%\)

nCO2 = 0,448 / 22,4 = 0,02 (mol)

2CH3COOH + CaCO3 -> (CH3COO)2Ca + CO2 + H2O

0,04 0,02 0,02

mCH3COOH = 0,04 * 60 = 2,4 (gam)

-> C%CH3COOH = 2,4 / 40 * 100% = 6%

mCaCO3 = 0,02 * 100 = 2 (gam)

Mg+2CH3COOH->(CH3COO)2Mg +H2

0,2------0,4--------------------0,2------------------0,2

nH2=0,2 mol

mMg=0,2.24=4,8g

NaOH+CH3COOH->CH3COONa+H2O

0,4-----------0,4 

Vdd=0,4/0,5=0,8l