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\(n_{CaCO_3}=\dfrac{100}{100}=1mol\)
\(CO_2+Ca\left(OH\right)_2\rightarrow CaCO_3+H_2O\)
1 1 ( mol )
\(C_2H_5OH+3O_2\rightarrow\left(t^o\right)2CO_2+3H_2O\)
0,5 1 ( mol )
\(V_{C_2H_5OH}=\dfrac{0,5.46}{0,8}=28,75ml\)
Độ rượu = \(\dfrac{28,75}{30}.100=95,83độ\)
tham khảo
Theo PT , nC2H5OH = 1/2 nCO2 = 0,5 mol
⇒ mC2H5OH = 0,5.46 = 23 gam
⇒ V C2H5OH = 23/0,8 = 28,75 ml
⇒ Độ rượu : Đr = 28,75/30.100 = 96 độ
a)
$C_2H_5OH + 3O_2 \xrightarrow{t^o} 2CO_2 + 3H_2O$
$CO_2 + Ca(OH)_2 \xrightarrow{t^o} CaCO_3 + H_2O$
Theo PTHH :
$n_{CO_2} = n_{CaCO_3} = \dfrac{167}{100} = 1,67(mol)$
$n_{C_2H_5OH} = \dfrac{1}{2}n_{CO_2} = 0,835(mol)$
$m_{C_2H_5OH} = 0,835.46 = 38,41(gam)$
$V_{C_2H_5OH} = \dfrac{m}{D} = \dfrac{38,41}{0,8} = 48,0125(ml)$
Độ rượu $= \dfrac{48,0125}{60}.100 = 80,03^o$
b) $n_{O_2} = \dfrac{3}{2}n_{CO_2} = 2,505(mol)$
$V_{O_2} = 2,505.22,4 = 56,112(lít)$
$V_{kk} = 5V_{O_2} = 280,56(lít)$
\(n_{CaCO_3}=\dfrac{100,2}{100}=1,002\left(mol\right)\)
PTHH: Ca(OH)2 + CO2 ---> CaCO3 + H2O
1,002 <---- 1,002
C2H5OH + 3O2 --to--> 2CO2 + 3H2O
0,501 <-------------------- 1,002
\(\rightarrow m_{C_2H_5OH}=0,501.46=23,046\left(g\right)\\ \rightarrow V_{C_2H_5OH}=\dfrac{23,046}{0,8}=28,8075\left(ml\right)\)
=> Độ rượu là: \(\dfrac{29,8075}{30}=96,025^o\)
PTHH: \(C_2H_5OH+3O_2\xrightarrow[]{t^o}2CO_2+3H_2O_{ }\)
\(CO_2+Ca\left(OH\right)_2\rightarrow CaCO_3\downarrow+H_2O\)
a) Ta có: \(n_{CaCO_3}=\dfrac{160}{100}=1,6\left(mol\right)=n_{CO_2}\) \(\Rightarrow n_{O_2}=2,4\left(mol\right)\)
\(\Rightarrow V_{kk}=\dfrac{2,4\cdot22,4}{20\%}=268,8\left(l\right)\)
b) Theo PTHH: \(n_{C_2H_5OH}=\dfrac{1}{2}n_{CO_2}=0,8\left(mol\right)\)
\(\Rightarrow a=C\%_{C_2H_5OH}=\dfrac{0,8\cdot46}{50\cdot0,8}\cdot100\%=92\%=92^o\)
\(V_{C_2H_5OH}=\dfrac{20.96}{100}=19,2\left(ml\right)\)
=> \(m_{C_2H_5OH}\) = 19,2.0,8 = 15,36 (g)
=> \(n_{C_2H_5OH}=\dfrac{15,36}{46}=\dfrac{192}{575}\left(mol\right)\)
PTHH: \(C_2H_5OH+3O_2\underrightarrow{t^o}2CO_2+3H_2O\)
Theo PTHH: \(n_{O_2}=\dfrac{576}{575}\left(mol\right)\Rightarrow V_{O_2\left(đktc\right)}=\dfrac{576}{575}.22,4=\dfrac{12902,4}{575}\left(l\right)\)
a) $C_2H_5OH + 3O_2 \xrightarrow{t^o} 2CO_2 + 3H_2O$
b) $n_{C_2H_5OH} = \dfrac{9,2}{46} = 0,2(mol)$
Theo PTHH :
$n_{CO_2} = 2n_{C_2H_5OH} = 0,4(mol) \Rightarrow V_{CO_2} = 0,4.22,4 = 8,96(lít)$
$n_{H_2O} = 3n_{C_2H_5OH} = 0,6(mol) \Rightarrow m_{H_2O} = 0,6.18 = 10,8(gam)$
c) $CO_2 + Ca(OH)_2 \to CaCO_3 + H_2O$
$n_{CaCO_3} = n_{CO_2} = 0,4(mol)$
$m_{CaCO_3} = 0,4.100 = 40(gam)$
a) C2H5OH + 3O2 \(\underrightarrow{t^0}\) 2CO2 + 3H2O (1)
CO2 + Ca(OH)2 \(\rightarrow\) CaCO3\(\downarrow\) + H2O (2)
Ta có: \(n_{CaCO_3}=\dfrac{50}{100}=0,5\)(mol)
Theo phương trình (2): \(n_{CO_2}=n_{CaCO_3}=0,5\)(mol)
Theo phương trình (1): \(n_{O_2}=\dfrac{3}{2}\cdot n_{CO_2}=0,5\cdot\dfrac{3}{2}=0,75\)(mol)
\(\Rightarrow V_{O_2}=0,75\cdot22,4=16,8\)(l)
Do đó: Vkhông khí = 16,8 \(\cdot\) 5 = 84 (l)
b) Theo phương trình (1): \(n_{C_2H_5OH}=\dfrac{1}{2}\cdot n_{CO_2}=\dfrac{1}{2}\cdot0,5=0,25\)(mol)
\(\Rightarrow m_{C_2H_5OH}=46\cdot0,25=11,5\)(g)
Nên: \(V_{C_2H_5OH}=\dfrac{11,5}{0,8}=14,375\)(ml)
Vậy độ rượu là: \(\dfrac{14,375}{15}\cdot100\approx95,83^0\)
cảm ơn nhoa