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a)
$C_2H_5OH + O_2 \xrightarrow{men\ giấm} CH_3COOH + H_2O$
V rượu = 57,5.12/100 = 6,9(lít) = 6900(cm3)
=> m rượu = 6900.0,8 = 5520(gam)
Theo PTHH :
n CH3COOH = n C2H5OH = 5520/46 = 120(mol)
m CH3COOH = 120.60 = 7200(gam)
b)
m dd giấm = 7200/4% = 180 000(gam)
\(V_r=57.5\cdot0.12=6.9\left(l\right)\)
\(m_{C_2H_5OH}=6.9\cdot0.8=5.52\left(g\right)\)
\(n_{C_2H_5OH}=\dfrac{5.52}{46}=0.12\left(mol\right)\)
\(n_{C_2H_5OH\left(pư\right)}=0.12\cdot92\%=0.1104\left(mol\right)\)
\(C_2H_5OH+O_2\underrightarrow{mg}CH_3COOH+H_2O\)
\(0.1104........................0.1104\)
\(m_{dd_{CH_3COOH}}=\dfrac{0.1104\cdot60}{4\%}=165.6\left(g\right)\)
a.\(V_{C_2H_5OH}=\dfrac{10.8}{100}=0,8ml\)
\(m_{C_2H_5OH}=0,8.0,8=1,6g\)
\(n_{C_2H_5OH}=\dfrac{1,6}{46}=0,034mol\)
\(C_2H_5OH+O_2\rightarrow\left(men.giấm\right)CH_3COOH+H_2O\)
0,034 0,034 ( mol )
\(m_{CH_3COOH}=0,034.60.80\%=1,632g\)
b.\(m_{dd_{CH_3COOH}}=\dfrac{1,632}{5\%}=32,64g\)
a. \(m_{C_2H_5OH}=\dfrac{10.0,8.8}{100}=0,64\left(kg\right)\)
\(n_{C_2H_5OH}=\dfrac{0,64}{46}=\dfrac{8}{575}\left(k-mol\right)\)
\(C_2H_5OH+O_2\rightarrow\left(t^o,men.giấm\right)CH_3COOH+H_2O\)
\(\dfrac{8}{575}\) \(\dfrac{8}{575}\) ( k-mol )
\(m_{CH_3COOH}=\dfrac{8}{575}.60.92\%=0,768\left(kg\right)=768\left(g\right)\)
b.\(m_{dd_{CH_3COOH}}=\dfrac{768.100}{4}=19200\left(g\right)\)
a, \(V_{C_2H_5OH}=\dfrac{10.9}{100}=0,9\left(l\right)=900\left(ml\right)\)
\(\Rightarrow m_{C_2H_5OH}=900.0,8=720\left(g\right)\Rightarrow n_{C_2H_5OH}=\dfrac{720}{46}=\dfrac{360}{23}\left(mol\right)\)
PT: \(C_2H_5OH+O_2\underrightarrow{^{mengiam}}CH_3COOH+H_2O\)
Theo PT: \(n_{CH_3COOH\left(LT\right)}=n_{C_2H_5OH}=\dfrac{360}{23}\left(mol\right)\)
Mà: H = 92%
\(\Rightarrow n_{CH_3COOH\left(TT\right)}=\dfrac{360}{23}.92\%=14,4\left(mol\right)\)
\(\Rightarrow m_{CH_3COOH}=14,4.60=864\left(g\right)\)
b, \(m_{ddgiam}=\dfrac{864}{5\%}=17280\left(l\right)\)
\(a,C_2H_5OH+O_2\left(men.giấm\right)\rightarrow CH_3COOH+H_2O\\ V_{C_2H_5OH\left(ng.chất\right)}=\dfrac{2,875}{10}=0,2875\left(l\right)=287,5\left(ml\right)\\ m_{C_2H_5OH}=287,5.0,8=230\left(g\right)\\ n_{C_2H_5OH}=\dfrac{230}{46}=5\left(mol\right)\\ n_{CH_3COOH\left(LT\right)}=n_{C_2H_5OH}=5\left(mol\right)\\ n_{CH_3COOH\left(TT\right)}=5.80\%=4\left(mol\right)\\ m_{CH_3COOH\left(TT\right)}=4.60=240\left(g\right)\\ b,m_{dd.giấm}=\dfrac{240.100}{5}=4800\left(gam\right)\)
a)
Thể tích rượu etylic nguyên chất có trong 8l dd rượu là : VC2H5OH = \(\dfrac{8.5}{100}=0,4\left(l\right)\)
Khối lượng của rượu etylic là : m = D.V = 0,8.0,4.1000 = 320(g)
PTHH :
\(C2H5OH+O2-^{men,giấm}->CH3COOH+H2O\)
46g -----------------------------------> 60g
320g-----------------------------------> x g
=> x = 417,39(g)
Vì H = 8o% nên => mCH3COOH(thực tế) = \(\dfrac{417,39.80}{100}=333,912\left(g\right)\)
b) mdd(giấm) = \(\dfrac{333,912.100}{5}=6678,24\left(g\right)\)
a)
Thể tích rượu etylic nguyên chất có trong 8l dd rượu là : VC2H5OH = 8.5100=0,4(l)8.5100=0,4(l)
Khối lượng của rượu etylic là : m = D.V = 0,8.0,4.1000 = 320(g)
PTHH :
C2H5OH+O2−men,giấm−>CH3COOH+H2OC2H5OH+O2−men,giấm−>CH3COOH+H2O
46g -----------------------------------> 60g
320g-----------------------------------> x g
=> x = 417,39(g)
Vì H = 8o% nên => mCH3COOH(thực tế) = 417,39.80100=333,912(g)417,39.80100=333,912(g)
b) mdd(giấm) = 333,912.1005=6678,24(g)333,912.1005=6678,24(g)
Đúng 2 Bình luận Câu trả lời được cộng đồng lựa chọn Báo cáo sai phạm
\(C_2H_5OH+O_2\rightarrow\left(men.giấm\right)CH_3COOH+H_2O\\ V_{C_2H_5OH}=25.4\%=1\left(l\right)=1000\left(ml\right)\\ m_{C_2H_5OH}=1000.0,8=800\left(g\right)\\ m_{CH_3COOH\left(LT\right)}=\dfrac{800.60}{46}=\dfrac{48000}{46}\left(g\right)\\ m_{CH_3COOH\left(TT\right)}=\dfrac{48000}{46}:92\%=1134,2155\left(gam\right)\\ m_{ddCH_3COOH}=1135,2155:5\%=22684,31\left(g\right)\)
Bài 1:
PTHH: \(C_2H_5OH+O_2\xrightarrow[]{mengiấm}CH_3COOH+H_2O\)
Ta có: \(n_{C_2H_5OH}=\dfrac{115\cdot0,8}{46}=2\left(mol\right)=n_{CH_3COOH\left(lýthuyết\right)}\)
\(\Rightarrow m_{CH_3COOH\left(thực\right)}=2\cdot60\cdot90\%=108\left(g\right)\)
Bài 2:
PTHH: \(C_2H_5OH+CH_3COOH\xrightarrow[H_2SO_4\left(đ\right)]{t^o}CH_3COOC_2H_5+H_2O\)
Ta có: \(\left\{{}\begin{matrix}n_{CH_3COOH}=\dfrac{60}{60}=1\left(mol\right)\\n_{C_2H_5OH}=\dfrac{92}{46}=2\left(mol\right)\end{matrix}\right.\) \(\Rightarrow\) Rượu còn dư, Axit p/ứ hết
\(\Rightarrow n_{CH_3COOC_2H_5\left(lýthuyết\right)}=1\left(mol\right)\) \(\Rightarrow m_{CH_3COOC_2H_5\left(thực\right)}=1\cdot88\cdot80\%=70,4\left(g\right)\)
