2Al(OH)\(_3\)\(\xrightarrow[]{}\)Al\(_2\)O\(_3\)+3H\(_2\)O
Đúng hay sai vậy ?
Pthh nào sau đây viết đúng:
1.
A.4Al+O\(_2\)➜2Al\(_2\)O\(_3\)
B.Al+O\(_2\)➜AlO\(_2\)
C.2Al+3O\(_2\)➜2Al\(_2\)O\(_3\)\(_{ }\)
D.4Al+3O\(_2\)➜2Al\(_2\)O\(_3\)
2.
A.2Zn+O\(_2\)➜2ZnO
B.Zn+O➜ZnO
C.Zn+O\(_2\)➜ZnO
D.Zn+O\(_2\)➜2ZnO
3.
A.2P+5O\(_2\)➜2P\(^2\)O\(_5\)
B.2P+O\(_2\)➜P\(_2\)O\(_5\)
C.2P+5O➜P\(_2\)O\(_5\)
D.4P+5O\(_2\)➜2P\(^2\)O\(_5\)
Ở điều kiện tiêu chuẩn, thể tích mol của chất khí = :
1.
A. 1,12 lít
B. 2,24 lít
C. 11,2 lít
D. 22,4 lít
2.
A. 44,8 lít
B. 22,4 lít
C. 32 lít
D. 2,24 lít
Số ntử Na có trong 1,5 moi ntử Na là:
A. 1,5 N
B. 6,023.10\(^{23}\)
C. 1 N
D. 12,046.10\(^{23}\)
tất cả phương trình hóa học đều sai vì thiếu điều kiện là nhiệt độ
1) \(Al\xrightarrow[]{\left(1\right)}Al_2O_3\xrightarrow[]{\left(2\right)}AlCl_3\xrightarrow[]{\left(3\right)}Al\left(OH\right)_3\)
2) \(Al\xrightarrow[]{\left(1\right)}AlCl_3\xrightarrow[]{\left(2\right)}Al\left(OH\right)_3\xrightarrow[]{\left(3\right)}Al_2O_3\)
3) \(Fe\xrightarrow[]{\left(1\right)}FeSO_4\xrightarrow[]{\left(2\right)}FeCl_2\xrightarrow[]{\left(3\right)}Fe\left(OH\right)_2\xrightarrow[]{\left(4\right)}FeO\)
4) \(Fe\left(OH\right)_2\xrightarrow[]{\left(1\right)}FeO\xrightarrow[]{\left(2\right)}FeSO_4\xrightarrow[]{\left(3\right)}FeCl_2\xrightarrow[]{\left(4\right)}Fe\left(OH\right)_2\)
5) \(Fe\xrightarrow[]{\left(1\right)}FeCl_2\xrightarrow[]{\left(2\right)}Fe\left(NO_3\right)_2\xrightarrow[]{\left(3\right)}Fe\left(OH\right)_2\xrightarrow[]{\left(4\right)}FeSO_4\)
6) \(Fe\xrightarrow[]{\left(1\right)}FeCl_3\xrightarrow[]{\left(2\right)}Fe\left(OH\right)_3\xrightarrow[]{\left(3\right)}Fe_2\left(SO_4\right)_3\xrightarrow[]{\left(4\right)}FeCl_3\)
7) \(Fe\left(NO_3\right)_3\xrightarrow[]{\left(1\right)}Fe\left(OH\right)_3\xrightarrow[]{\left(2\right)}Fe_2O_3\xrightarrow[]{\left(3\right)}Fe\xrightarrow[]{\left(4\right)}FeCl_3\)
8) \(Fe_2\left(SO_4\right)_3\xrightarrow[]{\left(1\right)}Fe\left(OH\right)_3\xrightarrow[]{\left(2\right)}Fe_2O_3\xrightarrow[]{\left(3\right)}Fe_2\left(SO_4\right)_3\xrightarrow[]{\left(4\right)}FeCl_3\)
1
1)4 Al+3O2→2Al2O3
(2)Al2O3+6HCl→2AlCl3+3H2O
(3)AlCl3+3NaOH→Al(OH)3+3NaCl
2
4Al+3O2→2Al2O3
Al2O3+6HCl→2AlCl3+3H2O
AlCl3+3NaOH→Al(OH)3+3NaCl
3
Fe+H2SO4→FeSO4+H2
(2)FeSO4+BaCl2→FeCl2+BaSO4
(3)FeCl2+2NaOH→Fe(OH)2+2NaCl
(4)Fe(OH)2→FeO+H2O
4
Fe+H2SO4→FeSO4+H2
FeSO4+BaCl2→FeCl2+BaSO4
FeCl2+2NaOH→Fe(OH)2+2NaCl
Fe(OH)2→FeO+H2O
5
Fe+2HCl→FeCl2+H2
(2)FeCl2+2AgNO3→Fe(NO3)2+2AgCl
(3)Fe(NO3)2+2NaOH→Fe(OH)2+2NaNO3
(4)Fe(OH)2+MgSO4→FeSO4+Mg(OH)2
Câu 1 :
( 1 ) 4Al + 3O2 → 2Al2O3 ( Nhiệt độ )
( 2 ) Al2O3 + 6HCl → 2AlCl3 + 3H2O
( 3 ) AlCl3 + 3NaOH → Al(OH)3 + 3NaCl
Câu 2 :
( 1 ) 2Al + 6HCl → 2AlCl3 + 3H2
( 2 ) AlCl3 + 3NaOH → Al(OH)3 + 3NaCl
( 3 ) 2Al(OH)3 → Al2O3 + 3H2O ( Nhiệt độ )
Câu 3 :
( 1 ) Fe + H2SO4 → H2 + FeSO4
( 2 ) BaCl2 + FeSO4 → FeCl2 + BaSO4
( 3 ) FeCl2 + 2NaOH → NaCl + Fe(OH)2
( 4 ) Fe(OH)2 → FeO + H2O ( Nhiệt độ )
Câu 4 :
( 1 ) Fe(OH)2 → FeO + H2O ( Nhiệt độ )
( 2 ) FeO + H2SO4 → H2O + FeSO4
( 3 ) BaCl2 + FeSO4 → FeCl2 + BaSO4
( 4 ) FeCl2 + 2NaOH → NaCl + Fe(OH)2
Câu 5 :
( 1 ) Fe + 2HCl → FeCl2 + H2
( 2 ) 2AgNO3 + FeCl2 → 2AgCl + Fe(NO3)2
( 3 ) Fe(NO3)2 + NaOH → NaNO3 + Fe(OH)2
( 4 ) H2SO4 + Fe(OH)2 → 2H2O + FeSO4
Câu 6 :
( 1 ) 3Cl2 + 2Fe → 2FeCl3 ( Nhiệt độ )
( 2 ) 3NaOH + FeCl3 → 3NaCl + Fe(OH)3
( 3 ) 3H2SO4 + 2Fe(OH)3 → Fe2(SO4)3 + 6H2O
( 4 ) 3BaCl2 + Fe2(SO4)3 → 2FeCl3 + 3BaSO4
Câu 7 :
( 1 ) 3NaOH + Fe(NO3)3 → 3NaNO3 + Fe(OH)3
( 2 ) 2Fe(OH)3 → Fe2O3 + 3H2O ( Nhiệt độ )
( 3 ) 2Al + Fe2O3 → Al2O3 + 2Fe
( 4 ) 3Cl2 + 2Fe → 2FeCl3 ( Nhiệt độ )
Câu 8 :
( 1 ) Fe2(SO4)3 + 6NaOH → 3Na2SO4 + 2Fe(OH)3
( 2 ) 2Fe(OH)3 → Fe2O3 + 3H2O ( Nhiệt độ )
( 3 ) Fe2O3 + 3H2SO4 → Fe2(SO4)3 + 3H2O
( 4 ) 3BaCl2 + Fe2(SO4)3 → 2FeCl3 + 3BaSO4
Viết PTHH hoàn thành sơ đò chuỗi phản ứng sau
Al(OH)\(_{ }\)\(_3\) \(\underrightarrow{\left(1\right)}\) Al\(_2\)O\(_3\)\(\underrightarrow{\left(2\right)}\) Al\(_2\)(SO\(_4\))\(_3\)\(\underrightarrow{\left(3\right)}\) BaSO\(_4\)
\(1\\ 2Al\left(OH\right)_3\rightarrow\left(t^o\right)Al_2O_3+3H_2O\\ 2\\ Al_2O_3+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2O\\ Al_2\left(SO_4\right)_3+3BaCl_2\rightarrow3BaSO_4+2AlCl_3\)
Hoàn thành chuỗi phản ứng theo thứ tự
a) Al -> Al\(_2\)O\(_3\) -> AlCl\(_3\) -> Al\(_2\)(SO\(_4\))\(_3\) -> Al(OH)\(_3\)
b) FeCl\(_2\) -> Fe(OH)\(_2\) -> FeO -> Fe -> FeCl\(_3\) -> Fe(OH)\(_3\) -> Fe\(_2\)O\(_3\) -> Fe\(_2\)(SO\(_4\))\(_3\) -> Fe(NO\(_3\))\(_2\)
a) 4Al+3O2--->2Al2O3
Al2O3+6HCl--->2AlCl3+3H2O
2AlCl3+ 3H2SO4--->Al2(SO4)3+6HCl
Al2(SO4)3+6NaOH----> 2Al(OH)3+3Na2SO4
b) FeCl2+2 NaOH--->Fe(OH)2+2NaCl
Fe(OH)2---->FeO+H2O
FeO+H2-->Fe+H2O
Fe+Cl2---->FeCl2
2FeCl2+Cl2--->2FeCl3
FeCl3+3NaOH--->Fe(OH)3+3NaOH
2Fe(OH)3---->Fe2O3+3H2O
Fe2(SO4)3+3HNO3---->Fe(NO3)3+3H2SO4
Al+ 6HCl -> AlCl\(_3\)+3H\(_2\)
đúng hay sai vậy các bạn ?
Sai nha bạn . Sai ở phần cân bằng
2Al + 6HCl \(\rightarrow\) 2AlCl3 + 3H2
thiếu bạn à!
PTHH: 2Al + 6HCl → 2AlCl3 + 3H2
2P+6KClO\(_3\)\(\xrightarrow[]{}\)P \(_2\)O\(_5\)+6KClO\(_3\)
Đúng hay sai bạn ?
Sai nha bạn . Sai ở phần cân bằng
5KClO3 + 6P → 5HCl + 3P2O5
Viết PTHH biễu diễn chỗi biến hóa:
1) KClO\(_3\) -->O\(_2\)-->K\(_2\)O-->KOH-->K\(_2\)SO\(_4\)-->KCl-->Cl\(_2\)
2) Cu-->CuSO\(_4\)-->CuCl\(_2\)-->Cu(NO\(_3\))\(_2\)-->Cu(OH)\(_2\)-->CuO-->Cu
3)Al-->Al\(_2\)O\(_3\)-->AlCl\(_3\)-->Al(OH)\(_3\)-->Al\(_2\)O\(_3\)-->Al-->NaAlO\(_2\)
4)C-->CO\(_2\)-->CO-->CO\(_2\)-->NaHCO\(_3\)-->Na\(_2\)CO\(_3\)-->CaCO\(_3\)-->CO\(_2\)
5)Cl\(_2\)-->HCL-->Cl\(_2\)-->NaCl-->Cl\(_2\)-->NaClO-->
1.
\(2KClO_3\rightarrow2KCl+3O_2\)
\(4K+O_2\rightarrow2K_2O\)
\(K_2O+H_2O\rightarrow2KOH\)
\(2KOH+H_2SO_4\rightarrow K_2OSO_4+2H_2O\)
\(K_2SO_4+BaCl_2\rightarrow2KCl+BaSO_4\)
\(2KCl+2H_2O\rightarrow2KOH+Cl_2+H_2\)
2.
\(Cu+H_2SO_{4_{dac}}\rightarrow CuSO_4+SO_2+2H_2O\)
\(CuSO_4+BaCl_2\rightarrow CuCl_2+BaSO_4\)
\(CuCl_2+2AgNO_3\rightarrow Cu\left(NO_3\right)_2+2AgCl\)
\(Cu\left(NO_3\right)_2+2NaOH\rightarrow NaNO_3+Cu\left(OH\right)_2\)
\(Cu\left(OH\right)_2\rightarrow CuO+H_2O\)
\(CuO+H_2\rightarrow Cu+H_2O\)
3.
\(4Al+3O_2\rightarrow2Al_2O_3\)
\(Al_2O_2+6HCl\rightarrow2AlCl_3+3H_2O\)
\(AlCl_3+3NaOH\rightarrow Al\left(OH\right)_3+3NaCl\)
\(2Al\left(OH\right)_2\rightarrow Al_2O_3+H_2O\)
\(2Al_2O_3\rightarrow4Al+3O_2\)
\(2Al+2NaOH+2H_2O\rightarrow2NaAlO_2+3H_2\)
4.
\(C+O_2\rightarrow CO_2\)
\(CO_2+C\rightarrow2CO\)
\(2CO+O_2\rightarrow2CO_2\)
\(CO_2+NaOH\rightarrow NaHCO_2\)
\(NaHCO_3+NaOH\rightarrow Na_2CO_3+H_2O\)
\(Na_2CO_3+CaCl_2\rightarrow2NaCl+CaCO_3\)
\(CaCO_3\rightarrow CaO+CO_2\)
5.
\(Cl_2+H_2\rightarrow2HCl\)
\(4HCl+MnO_2\rightarrow MnCl_2+Cl_2+2H_2O\)
\(Cl_2+2NaOH\rightarrow NaCl+NaClO+H_2O\)
\(2NaC+2H_2O\rightarrow2NaOH+Cl_2+H_2\)
\(Cl_2+2NaOH\rightarrow NaCl+NaClO+H_2O\)
Viết PTHH biễu diễn chỗi biến hóa:
1) 2KClO3 -->2KCl+3O2
O2+4K-->2K2O
K2O+H2O-->2KOH
2KOH+H2SO4-->K2SO4+2H2O
K2SO4+BaCl2-->2KCl+BaSO4
2KCl-->Cl2+2K
2) Cu+FeSO4-->CuSO4+Fe
CuSO4+BaCl2-->CuCl2+BaSO4
CuCl2+2AgNO3-->Cu(NO3)2+2AgCl
Cu(NO3)+2NaOH-->Cu(OH)2+2NaNO3
Cu(OH)2-->CuO+H2O
2CuO-->2Cu+O2
3)4Al+3O2-->2Al2O3
Al2O3+6HCl-->2AlCl3+3H2O
2AlCl3+6NaOH-->2Al(OH)3+6NaCl
2Al(OH)3-->Al2O3+3H2O
2Al2O3-->4Al+3O2
2Al+2H2O+2NaOH-->2NaAlO2+3H2
4)C+O2-->CO2
CO2+C-->2CO
2CO+O2---->2CO2-
CO2+NaOH----->NaHCO3
2NaHCO3-->Na2CO3+H2O+CO2
Na2CO3+CaCl2-->CaCO3+2NaCl
CaCO3-->CO2+CaO
5)Cl2+H2-->2HCL
2HCl-->Cl2+H2
Cl2+2Na-->2NaCl
2NaCl-->Cl2+2Na
Cl2+2NaOH-->NaClO+NaCl+H2O
1.KOH + \(Al_2\left(SO_4\right)_3\) \(\rightarrow\) \(K_2SO_4\) + \(Al\left(OH\right)_3\)
2.KMnO\(_4\) \(\rightarrow\)K\(_2\)MnO\(_4\) + MnO\(_2\) + O\(_2\)
3.Fe\(_3\)O\(_4\) + CO \(\rightarrow\) Fe + CO\(_2\)
4. KClO\(_3\) \(\rightarrow\) KCL + O\(_2\)
5. Al(OH)\(_3\) + H\(_2\)SO\(_4\) \(\rightarrow\) Al\(_2\)(SO\(_4\))\(_3\) + H\(_2\)O
1.6KOH + Al2(SO4)3 → 3K2SO4 + 2Al(OH)3
2.2KMnO4 →K2MnO4 + MnO2 + O2
3.Fe3O4 + 4CO → 3Fe + 4CO2
4. 2KClO3→ 2KCl + 3O2
5. 2Al(OH)3 + 3H2SO4→ Al2(SO4)3 + 3H2O
Diệp Tử Vân đề yêu cầu cân bằng hả bạn :))
Cho các chất sau :NO,Al\(_2\)O\(_3\) ,SO\(_2\) ,CuO,Fe\(_2\)O\(_3\) ,P\(_2\)O\(_5\) ,MgO,PbO,Na\(_2\)O,SO\(_3\) ,CaO,FeO,CO\(_2\) .
Viết PT phản ứng với H\(_2\) ,H\(_2\)O,dung dịch HCl,Ba(OH)\(_2\)
tác dụng với H2
+) 3H2 + Al2O3 \(\underrightarrow{to}\) 2Al + 3H2O
+) H2 + CuO \(\underrightarrow{to}\) Cu + H2O
+) 3H2 + Fe2O3 \(\underrightarrow{to}\) 2Fe + 3H2O
+) H2 + MgO \(\underrightarrow{to}\) Mg + H2O
+) H2 + FeO \(\underrightarrow{to}\) Fe + H2O
tác dụng với H2O :
+) H2O + SO2 -> H2SO3
+) 3H2O + P2O5 -> 2H3PO4
+) H2O + Na2O -> 2NaOH
+) H2O + SO3 -> H2SO4
+) H2O + CaO -> Ca(OH)2
+) H2O + CO2 -> H2CO3
Tác dụng với HCl
+) Al2O3 + 6HCl -> 2AlCl3 + 3H2O
+) Fe2O3 + 6HCl -> 2FeCl3 + 3H2O
+) MgO + 2HCl -> MgCl2 + H2O
+) PbO + 2HCl -> PbCl2 + H2O
+) Na2O + 2HCl -> 2NaCl + H2O
+)CaO + 2HCl -> CaCl2 + H2O
+) FeO + 2HCl -> FeCl2 + H2O
tác dụng với Ba(OH)2 :
+) Ba(OH)2 + SO2 -> BaSO3 + H2O
+) 3Ba(OH)2 + P2O5 -> Ba3(PO4)2 + 3H2O
+) Ba(OH)2 + SO3 -> BaSO4 + H2O
+) Ba(OH)2 + CO2 -> BaCO3 + H2O
- H2
CuO + H2 -to-> Cu + H2O
Fe2O3 + 3H2 -to-> 2Fe + 3H2O
PbO + H2 -to-> Pb + H2O
FeO + H2 -to-> Fe + H2O
- H2O
SO2 + H2O --> H2SO3
P2O5 + 3H2O --> 2H3PO4
Na2O + H2O --> 2NaOH
SO3 + H2O --> H2SO4
CaO + H2O --> Ca(OH)2
CO2 + H2O <--> H2CO3
- Ba(OH)2 :
Ba(OH)2 + SO2 --> BaSO3 + H2O
Ba(OH)2 + P2O5 --> Ba3(PO4)2 +H2O
Ba(OH)2 + SO3 --> BaSO4 + H2O
Ba(OH)2 + CO2 --> BaCO3 + H2O
PTHH tự cân bằng nhé