a)

$V_{C_2H_5OH} = 200.\dfrac{11,5}{100} = 23(ml)$
$m_{C_2H_5OH} = D.V = 0,8.23 = 18,4(gam)$
$n_{C_2H_5OH} = \dfrac{18,4}{46} = 0,4(mol)$

b)

$n_{C_2H_5OH\ pư} = 0,4.80\% = 0,32(mol)$
$C_2H_5OH + O_2 \xrightarrow{men\ giấm} CH_3COOH + H_2O$
$n_{CH_3COOH} = n_{C_2H_5OH\ pư} = 0,32(mol)$
$C_{M_{CH_3COOH}} = \dfrac{0,32}{0,2} = 1,6M$

\(a,n_{C_6H_{12}O_6}=\dfrac{450}{180}=2,5\left(mol\right)\)

PTHH: C₆H₁₂O₆ --men rượu--> 2C₂H₅OH + 2CO₂

                2,5-------------------------->5

            C₂H₅OH + O₂ --men giấm--> CH₃COOH + H₂O

               5------------------------------------>5

\(b,m_{C_2H_5OH}=5.46=230\left(g\right)\)

\(c,m_{CH_3COOH}=5.80\%.60=240\left(g\right)\)

a)\(n_{C_6H_{12}O_6}=\dfrac{450}{180}=2,5mol\)

\(C_6H_{12}O_6\underrightarrow{menrượu}2C_2H_5OH+2CO_2\)

2,5                              5

b)\(m_{C_2H_5OH}=5\cdot46=230g\)

c)\(C_2H_5OH+O_2\underrightarrow{mengiấm}CH_3COOH+H_2O\)

    5                                         5

Thực tế: \(n_{CH_3COOH}=5\cdot80\%=4mol\)

\(m_{CH_3COOH}=4\cdot60=240g\)

\(C_2H_5OH+O_2\rightarrow\left(men.giấm\right)CH_3COOH+H_2O\\ V_{C_2H_5OH}=10000.8:100=800\left(ml\right)\\ m_{C_2H_5OH}=0,8.800=640\left(g\right)\\ m_{CH_3COOH}=\dfrac{60}{46}.640.80\%=\dfrac{30720}{46}\left(g\right)\\ m_{10lethanol}=640+9200.1=9840\left(g\right)\\ m_{O_2}=\dfrac{640.32}{46}=\dfrac{20480}{46}\left(g\right)\\ C\%_{ddCH_3COOH}=\dfrac{\dfrac{30720}{46}}{9840+\dfrac{20480}{46}}.100\%\approx6,493\%\)

a, \(n_{K_2CO_3}=\dfrac{2,76}{138}=0,02\left(mol\right)\)

PT: \(2CH_3COOH+K_2CO_3\rightarrow2CH_3COOK+CO_2+H_2O\)

Theo PT: \(n_{CH_3COOH}=2n_{K_2CO_3}=0,04\left(mol\right)\)

\(\Rightarrow C\%_{CH_3COOH}=\dfrac{0,04.60}{50}.100\%=4,8\%\)

b, \(C_2H_5OH+O_2\underrightarrow{mengiam}CH_3COOH+H_2O\)

Theo PT: \(n_{C_2H_5OH}=n_{CH_3COOH}=0,04\left(mol\right)\Rightarrow m_{C_2H_5OH}=0,04.46=1,84\left(g\right)\)

\(\Rightarrow V_{C_2H_5OH}=\dfrac{1,84}{0,8}=2,3\left(ml\right)\)

\(\Rightarrow V_{C_2H_5OH\left(8^o\right)}=\dfrac{2,3}{8}.100=28,75\left(ml\right)\)

\(a,C_2H_5OH+O_2\left(men.giấm\right)\rightarrow CH_3COOH+H_2O\\ V_{C_2H_5OH\left(ng.chất\right)}=\dfrac{2,875}{10}=0,2875\left(l\right)=287,5\left(ml\right)\\ m_{C_2H_5OH}=287,5.0,8=230\left(g\right)\\ n_{C_2H_5OH}=\dfrac{230}{46}=5\left(mol\right)\\ n_{CH_3COOH\left(LT\right)}=n_{C_2H_5OH}=5\left(mol\right)\\ n_{CH_3COOH\left(TT\right)}=5.80\%=4\left(mol\right)\\ m_{CH_3COOH\left(TT\right)}=4.60=240\left(g\right)\\ b,m_{dd.giấm}=\dfrac{240.100}{5}=4800\left(gam\right)\)

C₆H₁₂O₆→ 2CO₂+ 2C₂H₅OH

0,1mo      l→            0,2mol     →m_{rượu ng/chất} =9,2g  →V_ng/chất=\(\frac{m}{D}=\frac{9,2}{0,8}=11,5ml\)

Độ rượu=40=\(\frac{Vruou\left(ngchat\right)}{Vdd}\)\(\times100\)→Vdd/thu đk= \(\frac{11,5\times100}{40}=27,85ml\)

a) 

$C_6H_{12}O_6 \xrightarrow{t^o,xt} 2CO_2 + 2C_2H_5OH$

720 ml = 720 cm3

m dd glucozo = D.V = 720.1 = 720(gam)

m glucozo = 720.5% = 36(gam)

n glucozo = 36/180 = 0,2(mol)

Theo PTHH :

n C2H5OH = 2n glucozo = 0,4(mol)

m C2H5OH = 0,4.46 = 18,4(gam)

b)

V rượu = m/D = 18,4/0,8 = 23(ml)

Vậy :

Đr = 23/240  .100 = 9,583^o