hoàn thành các PTHH sau và ghi điều kiện ( nếu có ):
1) Al + Cl2 → ....
2) P2O5 + Ca(OH)2 →......
3) Al2(SO4)3 + BaCl2 →.....
4) Zn(OH)2 \(\underrightarrow{t0}\)
5) Al2O3 + 3H2SO4 →....
6) Zn + FeSO4 →.....
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\(2Al+3H_2SO_4\to Al_2(SO_4)_3+3H_2\\ Al_2(SO_4)_3+3BaCl_2\to 2AlCl_3+3BaSO_4\downarrow\\ AlCl_3+3NaOH\to Al(OH)_3\downarrow +3NaCl\\ 2Al(OH)_3\xrightarrow{t^o}Al_2O_3+3H_2O\\ 2Al_2O_3\xrightarrow{đpnc}4Al+3O_2\)
C1:
\(2KMnO_4\rightarrow K_2MnO_4+ MnO_2+O_2\)(tỉ lệ 2:1:1:1)
2Al(OH)\(_3\) + 3H\(_2\)SO\(_4\) → Al\(_2\)(SO4)\(_3\) + 6H2O(tỉ lệ 2:3:1:6)
\(4Na+O_2\rightarrow2Na_2O\)(tỉ lệ:4:1:2)
\(2Al+3Cl_2\rightarrow2AlCl_3\)(tỉ lệ:2:3:2)
\(2Fe\left(OH\right)_3\rightarrow Fe_2O_3+3H_2O\)(tỉ lệ:2:1:3)
\(Fe_2O_3+6HCl\rightarrow2FeCl_3+3H_2O\)(tỉ lệ 1:6:2:3)
\(4P+5O_2\rightarrow2P_2O_5\)(tỉ lệ:4:5:2)
\(Al_2O_3+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2O\)(tỉ lệ 1:3:1:3)
\(Cu+2AgNO_3\rightarrow Cu\left(NO_3\right)_2+2Ag\)(tỉ lệ :1:2:1)
C2/
a,
\(mFeO=0,07.72=5,04g\)
\(mNa_2SO_4=0,25.142=35,5g\)
\(mK_2SO_4=0,03.174=5,22g\)
\(mH_2SO_4=0,25.98=24,5g\)
C3/
a,
\(VO_{2_{đkt}}=1,25.24=30lit\)
\(VO_{2_{đktc}}=1,25.22,4=28lit\)
b,
\(VN_{2_{\left(đkt\right)}}=0,125.24=3lit\)
\(VN_{2_{\left(đktc\right)}}=0,125.22,4=2,8lit\)
\(a) 2Al(OH)_3 + 3H_2SO_4 \to Al_2(SO_4)_3 + 3H_2O\\ b) Fe_3O_4 + 4CO \xrightarrow{t^o} 3Fe + 4CO_2\\ c) 4FeS_2 + 11O_2 \xrightarrow{t^o} 2Fe_2O_3 + 8SO_2\\ d) 2Cu(NO_3)_2 \xrightarrow{t^o} 2CuO + 4NO_2 + O_2\)
a) 2Fe+3Cl2--->2FeCl3
FeCl3+3NaOH--->3NaCl+Fe(OH)3
3Fe(OH)3-->Fe2O3+3H2O
Fe2O3+H2---->2Fe+3H2O
Fe+H2SO4---->FeSO4+H2
FeSO4+BaCl2---->FeCl2+BaSO4
b) Fe+2HCl--->FeCl2+H2
FeCl2+AgNO3--->2AgCl+Fe(NO3)2
Fe(NO3)2+2NaOH--->2NaNO3+Fe(OH)2
Fe(OH)2+Na2SO4--->2NaOH+FeSO4
FeSO4+Zn----->ZnSO4+Fe
Fe+.....Ko biết
c)4 Al+3O2--->2Al2O3
Al2O3+3H2SO4--->Al2(SO4)3+3H2O
Al2(SO4)3+3BaCl2---->2AlCl3+3BaCl2
Alcl3+3NaOH--->Al(OH)3+3NaCl
2Al(OH)3--->Al2O3+3H2O
2Al2O3--->4Al+3O2
a) 2Fe+3Cl2--->2FeCl3
FeCl3+3NaOH--->3NaCl+Fe(OH)3
3Fe(OH)3-->Fe2O3+3H2O
Fe2O3+H2---->2Fe+3H2O
Fe+H2SO4---->FeSO4+H2
FeSO4+BaCl2---->FeCl2+BaSO4
b) Fe+2HCl--->FeCl2+H2
FeCl2+AgNO3--->2AgCl+Fe(NO3)2
Fe(NO3)2+2NaOH--->2NaNO3+Fe(OH)2
Fe(OH)2+Na2SO4--->2NaOH+FeSO4
FeSO4+Zn----->ZnSO4+Fe
ko có PTHH
c)4 Al+3O2--->2Al2O3
Al2O3+3H2SO4--->Al2(SO4)3+3H2O
Al2(SO4)3+3BaCl2---->2AlCl3+3BaCl2
Alcl3+3NaOH--->Al(OH)3+3NaCl
2Al(OH)3--->Al2O3+3H2O
2Al2O3--->4Al+3O2
1. CaO + 2HCl ---> CaCl2 + H2O (1 : 2 : 1 : 1)
2. 2Fe + 3Cl2 ---to---> 2FeCl3 (2 : 3 : 2)
3. Zn + 2HCl ---> ZnCl2 + H2 (1 : 2 : 1 : 1)
4. 3Ba(OH)2 + 2FeCl3 ---> 2Fe(OH)3 + 3BaCl2 (3 : 2 : 2 : 3)
5. 4Al + 3O2 ---to---> 2Al2O3 (4 : 3 : 2)
1) \(2Al+3Cl_2\underrightarrow{t^o}2AlCl_3\)
2) \(P_2O_5+3Ca\left(OH\right)_2\rightarrow Ca_3\left(PO_4\right)_2+3H_2O\)
3) \(Al_2\left(SO_4\right)_3+3BaCl_2\rightarrow2AlCl_3+3BaSO_4\downarrow\)
4) \(Zn\left(OH\right)_2\underrightarrow{t^o}ZnO+H_2O\)
5) \(Al_2O_3+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2O\)
6) \(Zn+FeSO_4\rightarrow ZnSO_4+Fe\)