ta có pthh :C2H5OH +3O2 ---------->2CO2 +3H2O
Tỳ lệ :0,2 mol-----0,6 mol-----0,4 mol (hiểu tại sao hông )
VCO2 :0,4 X 22,4 =(MÁY TÍNH ?)
nCO2=0,6mol -------->n KK =0,6 X 100/20 =3 MOL
Vkk =3 x 22,4 =67,2 l

Từ C₂H₄O₂ ta có: M = 60 g/mol; m_C = 2 x 12 = 24 g; m_H = 4 x 1 = 4 g;

M_O = 2 x 16 = 32 g.

%C = (24 : 60) x 100% = 40%; %H = (4 : 60) x 100% = 6,67%;

%O = 100% - 40% - 6,67% = 53,33%.

\(n_{C_2H_5OH}=\dfrac{9,2}{46}=0,2\left(mol\right)\)

\(C_2H_5OH+3O_2\underrightarrow{t^o}2CO_2+2H_2O\)

0,2              0,6         0,4      0,4 

\(a,V_{O_2}=0,6.22,4=13,44\left(l\right)\)

\(V_{kk}=13,44.5=67,2\left(l\right)\)

b, \(CO_2+Ca\left(OH\right)_2\rightarrow CaCO_3\downarrow+H_2O\)

    0,4                               0,4 

\(m_{CaCO_3}=0,4.100=40\left(g\right)\)

\(m_{CaCO_3tt}=40.95\%=38\left(g\right)\)

\(a.C_2H_5OH+3O_2-^{t^o}\rightarrow2CO_2+3H_2O\\ n_{C_2H_5OH}=0,3\left(mol\right)\\ n_{CO_2}=2n_{C_2H_5OH}=0,6\left(mol\right)\\ \Rightarrow V_{CO_2}=0,6.22,4=13,44\left(l\right)\\ b.n_{O_2}=3n_{C_2H_5OH}=0,6\left(mol\right)\\ MàV_{O_2}=\dfrac{1}{5}V_{kk}\\ \Rightarrow V_{kk}=V_{O_2}.5=0,6.22,4.5=67,2\left(l\right)\\ c.n_{NaOH}=0,9\left(mol\right)\\ Tacó:\dfrac{n_{NaOH}}{n_{CO_2}}=\dfrac{0,9}{0,6}=1,5\\ \Rightarrow Tạora2muốiNaHCO_3vàNa_2CO_3\\ Đặt:n_{NaHCO_3}=x\left(mol\right);n_{Na_2CO_3}=y\left(mol\right)\\ \Rightarrow\left\{{}\begin{matrix}x+y=0,6\left(BTnguyento\left(C\right)\right)\\x+2y=0,9\left(BTnguyento\left(Na\right)\right)\end{matrix}\right.\\ \Rightarrow\left\{{}\begin{matrix}x=0,3\\y=0,3\end{matrix}\right.\\ \Rightarrow m_{muối}=0,3.84+0,3.106=57\left(g\right)\)

a)C2H6O+3O2to→2CO2+3H2O

0,3-------------0,9------0,6

nC2H6O=\(\dfrac{13,8}{46}\)=0,3mol

nCO2=2nC2H6O=0,6mol

⇒VCO2=0,6×22,4=13,44l

⇒Vkk=0,9×22,4×5=100,8l

a) C₂H₅OH + 3O₂ --t^o--> 2CO₂ + 3H₂O

b) \(n_{C_2H_5OH}=\dfrac{46}{46}=1\left(mol\right)\)

PTHH: C₂H₅OH + 3O₂ --t^o--> 2CO₂ + 3H₂O

                  1----->3----------->2------->3

=> V_O2 = 22,4.3 = 67,2 (l)

c) m_H2O = 3.18 = 54 (g)

d) V_CO2 = 2.22,4 = 44,8 (l)

\(n_{C_2H_4}=\dfrac{8,96}{22,4}=0,4\left(mol\right)\)

C₂H₄ + 3O₂ ----t^o---> 2CO₂ + 2H₂O

0,4        1,2                                0,8

\(m_{H_2O}=0,8.18=14,4\left(g\right)\)

\(V_{kk}=5V_{O_2}=5.1,2.22,4=134,4\left(l\right)\)

\(n_{CO_2}=\dfrac{4,48}{22,4}=0,2mol\)

\(C_2H_5OH+3O_2\underrightarrow{t^o}2CO_2+3H_2O\)

0,2               0,6       0,4         0,6

a)\(m_{C_2H_5OH}=0,2\cdot46=9,2g\)

b)\(V_{O_2}=0,6\cdot22,4=13,44l\)

\(\Rightarrow V_{kk}=5V_{O_2}=5\cdot13,44=67,2l\)

\(n_{C_2H_4}=\dfrac{5,6}{22,4}=0,25\left(mol\right)\)

PT: \(C_2H_4+3O_2\underrightarrow{t^o}2CO_2+2H_2O\)

Theo PT: \(n_{O_2}=3n_{C_2H_4}=0,75\left(mol\right)\Rightarrow V_{O_2}=0,75.22,4=16,8\left(l\right)\)

\(\Rightarrow V_{kk}=\dfrac{V_{O_2}}{20\%}=84\left(l\right)\)