Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
2: \(2SO_2+O_2->2SO_3\)
3: \(2FeCl_2+Cl_2->2FeCl_3\)
Câu 1:
a) \(C_4H_9OH+6O_2\xrightarrow[]{t^o}4CO_2+5H_2O\)
b) \(2C_nH_{2n-2}+\left(3n-1\right)O_2\xrightarrow[]{t^o}2nCO_2+\left(2n-2\right)H_2O\)
c) \(2Al+6H_2SO_{4\left(đ\right)}\xrightarrow[]{t^o}Al_2\left(SO_4\right)_3+3SO_2\uparrow+6H_2O\)
Câu 2:
Ta có: \(\left\{{}\begin{matrix}n_{Fe}=\dfrac{11,2}{56}=0,2\left(mol\right)\\n_{Mg}=\dfrac{2,4}{24}=0,1\left(mol\right)\end{matrix}\right.\)
Bảo toàn nguyên tố: \(\left\{{}\begin{matrix}n_{Fe_2O_3}=\dfrac{1}{2}n_{Fe}=0,1\left(mol\right)\\n_{MgO}=n_{Mg}=0,1\left(mol\right)\end{matrix}\right.\)
\(\Rightarrow m_{rắn}=m_{Fe_2O_3}+m_{MgO}=0,1\cdot160+0,1\cdot40=20\left(g\right)\)
Câu 3:
a) PTHH: \(CuO+H_2\xrightarrow[]{t^o}Cu+H_2O\) (1)
\(Fe_2O_3+3H_2\xrightarrow[]{t^o}2Fe+3H_2O\) (2)
\(Fe+2HCl\rightarrow FeCl_2+H_2\uparrow\) (3)
b) Ta có: \(n_{H_2\left(3\right)}=\dfrac{2,24}{22,4}=0,1\left(mol\right)=n_{Fe}\) \(\Rightarrow m_{Cu}=12-0,1\cdot56=6,4\left(g\right)\) \(\Rightarrow n_{Cu}=0,1\left(mol\right)\)
Theo các PTHH: \(\left\{{}\begin{matrix}n_{CuO}=n_{Cu}=0,1\left(mol\right)\\n_{Fe_2O_3}=\dfrac{1}{2}n_{Fe}=0,05\left(mol\right)\end{matrix}\right.\) \(\Rightarrow\left\{{}\begin{matrix}m_{CuO}=0,1\cdot80=8\left(g\right)\\m_{Fe_2O_3}=0,05\cdot160=8\left(g\right)\end{matrix}\right.\)
\(\Rightarrow\%m_{CuO}=\dfrac{8}{8+8}\cdot100\%=50\%=\%m_{Fe_2O_3}\)
c) Theo các PTHH: \(n_{H_2}=n_{CuO}+3n_{Fe_2O_3}=0,1+0,15=0,25\left(mol\right)\)
\(\Rightarrow V_{H_2}=0,25\cdot22,4=5,6\left(l\right)\)
1/ Fe2O3+3CO\(\rightarrow\)2Fe+3CO2
2/ 3AgNO3+Al=Al(NO3)3+3Ag
3/ 2HCl+CaCO3=CaCl2+H2O+CO2
4/ 2C4H10+13O2=8CO2+10H2O
5/6NaOH+Fe2(SO4)3=2Fe(OH)3+3Na2SO4
6/4FeS2+11O2=2Fe2O3+8SO2
7/6KOH+Al2(SO4)3=3K2SO4+2Al(OH)3
8/2CH4+O2+2H2O=2CO2+6H2
9/8Al+3Fe3O4=4Al2O3+9Fe
10/FexOy+(x-y)CO=xFeO+(x-y)CO2
Viết phương trình hóa học biểu diễn sơ đồ biến hóa sau:
KClO3 -->(A) -->(B) -->(C) -->(D) -->CaCO3
(Trong đó (A), (B), (C), (D) là các chất riêng biệt).
2) Cho các chất rắn sau ở dạng bột: BaO, MgO, P2O5, Na2O, CuO, Fe2O3. Nêu cách làm để nhận ra mỗi chất. Viết phương trình hóa học xảy ra (nếu có).
1. Fe2O3 + 3CO → 2Fe + 3CO2
2. 3AgNO3 + Al → Al(NO3)3 + 3Ag
3. 2HCl + CaCO3 → CaCl2 + H2O + CO2
4. 2C4H10 + 13O2 → 8CO2 + 10H2O
5. 6NaOH + Fe2(SO4)3 → 2Fe(OH) + 3Na2SO4
6. 4FeS2 + 11O2 → 2Fe2O3 + 8SO2
7. 6KOH + Al2(SO4)3 → 3K2SO4 + 2Al(OH)3
8. CH4 + 2O2 → 2H2O + CO2
9. 8Al + 3Fe3O4 → 4Al2O3 +9Fe
10. FexOy + (y-x)CO → xFeO + (y-x)CO2
1. Fe2O3 + CO \(\rightarrow\) 2Fe + 3CO2
2. 3AgNO3 + Al \(\rightarrow\) Al(NO3)3 + 3Ag
3. 2HCl + CaCO3 \(\rightarrow\) CaCl2 + H2O + CO2
4. 2C4H10 + 13O2 \(\rightarrow\) 8CO2 + 10H2O
5. 6NaOH + Fe2(SO4)3 \(\rightarrow\) 2Fe(OH) + 3Na2SO4
6. 4FeS2 + 11O2 \(\rightarrow\) 2Fe2O3 + 8SO2
7. 6KOH + Al2(SO4)3 \(\rightarrow\) 3K2SO4 + 2Al(OH)3
8. 2CH4 + O2 + 2H2O \(\rightarrow\) 2CO2 +6H2
9. 8Al + 3Fe3O4 \(\rightarrow\) 4Al2O3 +9Fe
10. FexOy + (y-x)CO \(\rightarrow\) xFeO + (y-x)CO2
chúc bn học tốt
\(a) 2Al(OH)_3 + 3H_2SO_4 \to Al_2(SO_4)_3 + 3H_2O\\ b) Fe_3O_4 + 4CO \xrightarrow{t^o} 3Fe + 4CO_2\\ c) 4FeS_2 + 11O_2 \xrightarrow{t^o} 2Fe_2O_3 + 8SO_2\\ d) 2Cu(NO_3)_2 \xrightarrow{t^o} 2CuO + 4NO_2 + O_2\)
\(1.\) \(Fe_2O_3+3CO\rightarrow2Fe+3CO_2\)
\(2.\) \(3AgNO_3+Al\rightarrow Al\left(NO_3\right)_3+3Ag\)
\(3.\) \(2HCl+CaCO_3\rightarrow CaCl_2+H_2O+CO_2\)
\(4.\) \(2C_4H_{10}+13O_2\rightarrow8CO_2+10H_2O\)
\(5.\) \(6NaOH+Fe_2\left(SO_4\right)_3\rightarrow2Fe\left(OH\right)_3+3Na_2SO_4\)
\(6.\) \(4FeS_2+11O_2\rightarrow2Fe_2O_3+8SO_2\)
\(7.\) \(6KOH+Al_2\left(SO_4\right)_3\rightarrow3K_2SO_4+2Al\left(OH\right)_3\)
\(8.\) \(2CH_4+O_2+2H_2O\rightarrow2CO_2+6H_2\)
\(9.\) \(8Al+3Fe_3O_4\rightarrow4Al_2O_3+9Fe\)
\(10.\) \(Fe_xO_y+\left(y-x\right)CO\rightarrow xFeO+\left(y-x\right)CO_2\)
1.2FeO + \(\dfrac{1}{2}\)O2 → Fe2O3
2.2FexOy + \(\dfrac{3x-2y}{2}\) O2 → xFe2O3
3.2Al + 6HCl → 2AlCl3 + 3H2
4.Al2O3 + 3H2SO4 → Al2(SO4)3 + 3H2O
5.Al(OH)3 + 3HNO3 → Al(NO3)3 + 3H2O
6. 2Al + 3H2SO4 → Al2(SO4)3 + 3H2
7.2C4H10 + 13O2 → 8CO2 + 10H2O
8. 2KMnO4 → K2MnO4 + MnO2 + O2
9.2Cu(NO3)2 → 2CuO + 4NO2 + O2
10.M2Ox + 2xHNO3 → 2M(NO3)x + xH2O
1,
1) 2H2O2-->2H2O+O2
2)3H2O2+KI-->KIO3+3H2O
3)2CH4-->C2H2+3H2
4)CaC2+2H2O-->Ca(OH)2+C2H2
5)2C6H6+15O2-->12CO2+6H2O
6)3Ba(OH)2+2H3 PO4-->Ba3(PO)4+6H2O
7)AL2O3+2NAOH-->2NaAlO2+H2O
8)2AL+2NAOH+2H2O-->2Na ALO2+3H2
9)3H2SO4+2AL(OH)3-->AL2(SO4)3+6H20
10)C2H5OH+3O2-->3CO2+2H2O
1 H2S + O2 --
1) PbO + 2HCl --> PbCl2 + H2O
2) \(2SO_2+O_2\xrightarrow[V_2O_5]{t^o}2SO_3\)
3) 2CO + O2 --to--> 2CO2
4) \(Al_2\left(SO_4\right)_3+6AgNO_3\rightarrow2Al\left(NO_3\right)_3+3Ag_2SO_4\downarrow\)
5) \(Al_2\left(SO_4\right)_3+6NaOH\rightarrow2Al\left(OH\right)_3\downarrow+3Na_2SO_4\)