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Câu 3:
CH3CH2OH viết gọn lại thành C2H5OH
\(n_{CH3COOH}=0,1\left(mol\right)\)
\(n_{C2H5OH}=\frac{6,9}{46}=0,15\left(mol\right)\)
\(n_{CH3COOC2H5}=0,075\left(mol\right)\)
\(\frac{n_{CH3COOH}}{1}< \frac{n_{C2H5OH}}{1}\left(0,1< 0,15\right)\)nên hiệu xuất được tính theo CH3COOH
\(PTHH:C_2H_5+CH_3COOH\rightarrow CH_3COOC_2H_5+H_2O\)
\(H=\frac{n_{CH3COOC2H5}.100}{n_{CH3COOH}}=\frac{0,075.100}{0,1}=75\%\)
Câu 4:
Ta có:
\(V_{C2H5OH}=\frac{8,4}{0,8}=10,5\left(l\right)\)
\(\Rightarrow m_{H2O}=300.1=300\left(g\right)\)
\(\Rightarrow C\%_{C2H5OH}=\frac{8,4}{8,4+300}.100\%=2,7\%\)
\(D_r=\frac{10,5}{10,5+300}.100\%=3,38^o\)
1/ C + 2H2 -Ni,500oC-> CH4
2/ CH3COONa + NaOH -CaO, to-> CH4↑ + Na2CO3
3/ Al4C3 + 12H2O → 3CH4↑ + 4Al(OH)3↓
4/ CH4 + 2O2 -to-> CO2↑ + 2H2O
5/ CH4+ 2Cl2 -as-> CH2Cl2 + 2HCl↑
6/ CH2Cl2 + Cl2 -as-> CHCl3 + HCl ↑
7/ CHCl3 + Cl2 -as-> CH2Cl2 + HCl↑
8/ C2H4 + H2 →Ni C2H6↑
9/ n(CH2=CH2) →to, P (-CH2-CH2-)n(PE)
10/ C2H5OH →H2SO4đ C2H4↑ + H2O
11/ C2H2 + H2 →to, Pb C2H4↑
12/ CaC2 + 2H2O → C2H2↑ + Ca(OH)2
a,
Phải là FeCl3--->Fe(OH)3
\(\text{FeCl3 + 3NaOH -> Fe(OH)3 + 3NaCl }\)
\(\text{2Fe(OH)3 - to--> Fe2O3 + 3H2O}\)
\(\text{Fe2O3 + 3H2SO4 -> Fe2(SO4)3 + 3H2O}\)
\(\text{Fe2(SO4)3 + 3BaCl2 -> 2FeCl3 + 3BaSO4}\)
\(\text{2FeCl3 + 3Ca(OH)2 -> 2Fe(OH)3 + 3CaCl2}\)
b,
\(\text{SO2 + 2NaOH -> Na2SO3 + H2O}\)
\(\text{Na2SO3 + H2SO4 -> Na2SO4 + SO2 + H2O}\)
\(\text{Na2SO4 + Ba(OH)2 -> BaSO4 + 2NaOH}\)
\(\text{2NaOH + ZnCl2 -> Zn(OH)2 + 2NaCl}\)
\(\text{Zn(OH)2 --to--> ZnO + H2O}\)
a)
\(C_6H_{12}O_6\underrightarrow{men}2C_2H_5OH+2CO_2\)
\(C_2H_5OH+CH_3COOH⇌CH_3COOC_2H_5+H_2O\)
\(2CH_3COOH+Mg\rightarrow\left(CH_3COO\right)_2Mg+H_2\)
b)
\(CH_2=CH_2+H_2O\rightarrow C_2H_5OH\)
\(C_2H_5OH+O_2\underrightarrow{men}CH_3COOH+2H_2O\)
\(2CH_3COOH+2Na\rightarrow2CH_3COONa+H_2\)
\(CH_3COONa+NaOH\xrightarrow[CaO]{t^o}CH_4+Na_2CO_3\)
1/2 Cu + O2 --t-> 2CuO
2/ 2Al + 3CuCl2 -----> 2AlCl3 + 3Cu
3/ Na2SO4 + Ba(NO3)2 ----> BaSO4 + 2NaNO3
4/ Fe2O3 + 3CO --t--> 2Fe + 3CO2
5/ 2FeO + 4H2SO4 đặc nóng --t--> Fe2(SO4)3 + SO2 + 4H2O
\(a) 2Na + 2C_2H_5OH \to 2C_2H_5ONa + H_2\\ b) CH_3COOH + NaOH \to CH_3COONa + H_2O\\ c) (RCOO)_3C_3H_5 +3H_2O \to 3RCOOH + C_3H_5(OH)_3\\ d) C_2H_5OH + CH_3COOH \to CH_3COOC_2H_5 + H_2O\\ e) C_2H_2 + 2Br_2 \to C_2H_2Br_4\\ d) CH_4 + 2O_2 \xrightarrow{t^o} CO_2 + 2H_2O\\ g) (RCOO)_3C_3H_5 + 3NaOH \to 3RCOONa + C_3H_5(OH)_3\)
khó vc