\(\xrightarrow[4]{1}+\xrightarrow[5]{1}+\xrightarrow[4\:]{3}+\xrightarrow[6]{2}\)
\(CH_4\xrightarrow[]{\left(1\right)}A\xrightarrow[]{\left(2\right)}B\xrightarrow[]{\left(3\right)}C\xrightarrow[]{\left(4\right)}D\xrightarrow[]{\left(5\right)}E\xrightarrow[]{\left(6\right)}F\xrightarrow[]{\left(7\right)}CH_4\)
Xác định các chất và viết PTHH
\(CH_4\rightarrow C_2H_2\rightarrow C_2H_4\rightarrow C_2H_5OH\rightarrow CH_3COOH\rightarrow\\ CH_3COOC_2H_5\rightarrow CH_3COONa\rightarrow CH_4\)
PTHH:
\(\left(1\right)2CH_4\xrightarrow[\text{làm lạnh nhanh}]{1500^oC}C_2H_2+3H_2\\ C_2H_2+H_2\xrightarrow[t^o]{Pd\text{/}PdCO_3}C_2H_4\\ \left(3\right)C_2H_4+H_2O\xrightarrow[axit]{t^o}C_2H_5OH\\ C_2H_5OH+O_2\xrightarrow[]{\text{men giấm}}CH_3COOH+H_2O\\ CH_3COOH+C_2H_5OH\xrightarrow[t^o]{H_2SO_{4\left(đ\right)}}CH_3COOC_2H_5\\ CH_3COOC_2H_5+NaOH\rightarrow CH_3COONa+C_2H_5OH\\ CH_3COONa+NaOH\rightarrow Na_2CO_3+CH_4\)
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
a) \(\xrightarrow[3]{-1}+\xrightarrow[1]{2}-\xrightarrow[5]{6}\)
b) \(\xrightarrow[-9]{4}+\xrightarrow[15]{6}+\xrightarrow[9]{-5}-\xrightarrow[11]{2}+\xrightarrow[15]{7}\)
c) \(\xrightarrow[11]{7}-\left(\xrightarrow[5]{3}+\xrightarrow[11]{7}\right)\)
d) \(\xrightarrow[6]{-5}+\xrightarrow[-3]{8}-\xrightarrow[6]{29}\)
e)\(\left(\xrightarrow[22]{11}+\xrightarrow[11]{5}\right)-\xrightarrow[22]{19}\)
g) \(2-\xrightarrow[2]{1}-\xrightarrow[2]{5}\)
AI trả lời được mình sẽ tạng điểm sao và kết bạn
a)\(\dfrac{-1}{3}+\dfrac{2}{1}-\dfrac{6}{5}=\dfrac{-5}{15}+\dfrac{30}{15}-\dfrac{18}{15}=\dfrac{7}{15}\)
dai dong qua(de)
Xác định các chất
\(A\xrightarrow[\left(1\right)]{+O_2}B\xrightarrow[\left(2\right)]{+O_2,V_2O_5}C\xrightarrow[\left(3\right)]{+H_2O}D\xrightarrow[\left(4\right)]{+Cu}B\xrightarrow[\left(5\right)]{+Ca\left(OH\right)_2}E\xrightarrow[\left(6\right)]{+B}F\xrightarrow[\left(7\right)]{t^o}B\xrightarrow[\left(8\right)]{+G}D\)
A là thành phần chính của quặng pirit sắt
A: FeS2
B: SO2
C: SO3
D: H2SO4
E: CaSO3
F: Ca(HSO3)2
G: Br2
PTHH:
\(\left(1\right)4FeS_2+11O_2\xrightarrow[]{t^o}2Fe_2O_3+8SO_2\uparrow\\ \left(2\right)2SO_2+O_2\xrightarrow[V_2O_5]{t^o}2SO_3\uparrow\\ \left(3\right)SO_3+H_2O\rightarrow H_2SO_4\\ \left(4\right)2H_2SO_{4\left(đặc,nóng\right)}+Cu\rightarrow CuSO_4+SO_2\uparrow+2H_2O\\ \left(5\right)SO_2+Ca\left(OH\right)_2\rightarrow CaSO_3\downarrow+H_2O\\ \left(6\right)CaSO_3+SO_2+H_2O\rightarrow Ca\left(HSO_3\right)_2\)
\(\left(7\right)Ca\left(HSO_3\right)_2\xrightarrow[]{t^o}CaSO_3\downarrow+SO_2\uparrow+H_2O\\ \left(8\right)SO_2+Br_2+2H_2O\rightarrow H_2SO_4+2HBr\uparrow\)
Bài 1 : Chuỗi phản ứng :
a) \(Al\xrightarrow[]{\left(1\right)}Al_2O_3\xrightarrow[]{\left(2\right)}AlCl_3\xrightarrow[]{\left(3\right)}Al\left(OH\right)_3\)
b) \(Al\xrightarrow[\left(1\right)]{}Al_2O_3\xrightarrow[]{\left(2\right)}AlCl_3\xrightarrow[\left(3\right)]{}Al\left(OH\right)_3Al_2O_3\)
c) \(Fe\xrightarrow[]{\left(1\right)}FeSO_4\xrightarrow[]{\left(2\right)}FeCl_2\xrightarrow[]{\left(3\right)}Fe\left(OH\right)_2\xrightarrow[]{\left(4\right)}FeO\)
d) \(Zn\xrightarrow[]{\left(1\right)}ZnSO_4\xrightarrow[]{\left(2\right)}ZnCl_2\xrightarrow[]{\left(3\right)}Zn\left(OH\right)_2\xrightarrow[]{\left(4\right)}ZnO\)
e) \(Mg\left(OH\right)_2\xrightarrow[]{\left(1\right)}MgCl_2\xrightarrow[]{\left(2\right)}Mg\left(NO_3\right)_2\xrightarrow[]{\left(3\right)}Mg\left(OH\right)_2\xrightarrow[]{\left(4\right)}MgO\)
f) \(Fe\left(OH\right)_2\xrightarrow[]{\left(1\right)}FeO\xrightarrow[]{\left(2\right)}FeSO_4\xrightarrow[]{\left(3\right)}FeCl_2\xrightarrow[]{\left(4\right)}Fe\left(OH\right)_2\)
g) \(Fe\xrightarrow[]{\left(1\right)}FeCl_2\xrightarrow[]{\left(2\right)}Fe\left(NO_3\right)_2\xrightarrow[]{\left(3\right)}Fe\left(OH\right)_2\xrightarrow[]{\left(4\right)}FeSO_4\)
h) \(S\xrightarrow[]{\left(1\right)}SO_2\xrightarrow[]{\left(2\right)}SO_3\xrightarrow[]{\left(3\right)}H_2SO_4\xrightarrow[]{\left(4\right)}SO_2\)
k) \(Cu\xrightarrow[]{\left(1\right)}CuO\xrightarrow[]{\left(2\right)}CuSO_4\xrightarrow[]{\left(3\right)}Cu\left(NO_3\right)_2\xrightarrow[]{\left(4\right)}Cu\left(OH\right)_2\)
Bài 2 : Phân biệt các chất rắn
a) Hai chất rắn: \(Cao\) và \(P_2O_5\)
b) Hai chất rắn: BaO và \(P_2O_5\)
c) Hai chất rắn :\(Na_2O\) và \(P_2O_5\)
d) Hai chất rắn :\(K_2O\) và \(P_2O_5\)
e) Ba chất rắn : MgO, \(Na_2O\), \(P_2O_5\)
GIÚP MINH VỚI Ạ !!!!
Bài 2
a) -Cho nước vào
CaO+H2O---->Ca(OH)2
P2O5+3H2O--->2H2PO4
-Cho QT vào Ca(OH)2 và H3PO4
-Lm QT hóa xanh là Ca(OH)2
-->MT bđ là CaO
-Lm QT hóa đỏ là H3PO4
-->MT bđ là P2O5
b) -Cho nước
BaO+H2O--->Ba(OH)2
P2O5+3H2O--->2H2PO4
-Cho QT vào Ba(OH)2 và H3PO4
-Lm QT hóa xanh là Ba(OH)2
-->MT bđ là BaO
-Lm QT hóa đỏ là H3PO4
-->MT bđ là P2O5
c)-Cho nước vào
Na2O+H2O--->2NaOH
P2O5+3H2O--->2H2PO4
-Cho QT vào NaOH và H3PO4
-Lm QT hóa xanh là NaOH
-->MT bđ là Na2O
-Lm QT hóa đỏ là H3PO4
-->MT bđ là P2O5
d)
K2O+H2O--->2KOH
P2O5+3H2O--->2H2PO4
-Cho QT vào KOH và H3PO4
-Lm QT hóa xanh là KOH
-->MT bđ là K2O
-Lm QT hóa đỏ là H3PO4
-->MT bđ là P2O5
e)-Cho nước vào
+Ko tan là Mgo
+Tan là Na2O và P2O5
Na2O+H2O--->2NaOH
P2O5+3H2O--->2H2PO4
-Cho QT vào NaOH và H3PO4
-Lm QT hóa xanh là NaOH
-->MT bđ là Na2O
-Lm QT hóa đỏ là H3PO4
-->MT bđ là P2O5
a) Al(1)−→Al2O3(2)−→AlCl3(3)−→Al(OH)3Al→(1)Al2O3→(2)AlCl3→(3)Al(OH)3
b) Al−→(1)Al2O3(2)−→AlCl3−→(3)Al(OH)3Al2O3Al→(1)Al2O3→(2)AlCl3→(3)Al(OH)3Al2O3
c) Fe(1)−→FeSO4(2)−→FeCl2(3)−→Fe(OH)2(4)−→FeOFe→(1)FeSO4→(2)FeCl2→(3)Fe(OH)2→(4)FeO
d) Zn(1)−→ZnSO4(2)−→ZnCl2(3)−→Zn(OH)2(4)−→ZnOZn→(1)ZnSO4→(2)ZnCl2→(3)Zn(OH)2→(4)ZnO
e) Mg(OH)2(1)−→MgCl2(2)−→Mg(NO3)2(3)−→Mg(OH)2(4)−→MgOMg(OH)2→(1)MgCl2→(2)Mg(NO3)2→(3)Mg(OH)2→(4)MgO
f) Fe(OH)2→FeO+H2O
(2)FeO+H2SO4→FeSO4+H2O
(3)FeSO4+BaCl2→FeCl2+BaSO4
(4)FeCl2+2NaOH→Fe(OH)2+2NaCl
g) Fe(1)+2HCl→FeCl2+H2
(2)FeCl2+2AgNO3→Fe(NO3)2+2AgCl
(3)Fe(NO3)2+3NaOH→Fe(OH)2+2NaNO3
(4)Fe(OH)2+MgSO4→FeSO4+Mg(OH)2
h) S(1)+O2→SO2
(2)2SO2+O2→2SO3
(3)SO3+H2O→H2SO4
(4)6H2SO4+2Fe→Fe2(SO4)3+6H2O+2SO2
k) 2Cu(1)+O2→2CuO
(2)CuO+H2SO4→CuSO4+H2O
(3)CuSO4+Ba(NO3)2→Cu(NO3)2+BaSO4
(4)Cu(NO3)2+2NaOH→Cu(OH)2+2NaNO3
a) 4Al+3O2\(\rightarrow\)2Al2O3
(2) Al2O3+6HCl\(\rightarrow\)2AlCl3+3H2O
(3) AlCl3+3NaOH\(\rightarrow\)Al(OH)3+3NaCl
b)
4Al+3O2\(\rightarrow\)2Al2O3
Al2O3+6HCl\(\rightarrow\)2AlCl3+3H2O
AlCl3+3NaOH\(\rightarrow\)Al(OH)3+3NaCl
2Al(OH)3\(\rightarrow\)Al2O3+3H2O
c)
Fe+H2SO4\(\rightarrow\)FeSO4+H2
FeSO4+BaCl2\(\rightarrow\)FeCl2+BaSO4
FeCl2+2NaOH\(\rightarrow\)Fe(OH)2+2NaCl
Fe(OH)2\(\rightarrow\)FeO+H2O
d) Zn + H2SO4 \(\rightarrow\)ZnSO4 + H2
ZnSO4 + BaCl2 \(\rightarrow\) BaSO4 + ZnCl2
ZnCl2 + 2NaOH\(\rightarrow\) Zn(OH)2 + 2NaCl
Zn(OH)2 \(\underrightarrow{to}\) ZnO + H2O
e) Mg(OH)2 + 2HCl \(\rightarrow\) MgCl2 + 2H2O
MgCl2 + 2AgNO3 \(\rightarrow\) Mg(NO3)2 + 2AgCl
Mg(NO3)2 + 2NaOH \(\rightarrow\)Mg(OH)2 + 2NaNO3
Mg(OH)2 \(\rightarrow\) MgO + H2O
f) Fe(OH)2 \(\rightarrow\) FeO + H2O
FeO + H2SO4\(\rightarrow\)FeSO4 + H2O
FeSO4 + BaCl2 \(\rightarrow\) FeSO4 +BaCl2
FeCl2 + 2NaOH\(\rightarrow\)Fe(OH)3 + 2NaCl
g)Fe + 2HCl \(\rightarrow\) FeCl2 + H2
FeCl2 + Pb(NO3)2 -> PbCl2 + Fe(NO3)2
Fe(NO3)2 + 2NaOH \(\rightarrow\) Fe(OH)2 + 2NaNO3
Fe(OH)2 + H2SO4\(\rightarrow\) FeSO4 + 2H2O
h)S + O2 \(\rightarrow\) SO2
2SO2 + O2 \(\rightarrow\) 2SO3
SO3 + H2O \(\rightarrow\) H2SO4
Cu +2H2SO4 đ\(\rightarrow\) CuSO4 + SO2 + 2H2O
k) 2Cu + O2 \(\rightarrow\)2CuO
CuO + H2SO4 \(\rightarrow\) CuSO4 + H2O
CuSO4 + Ba(NO3)2 \(\rightarrow\) Cu(NO3)2 + BaSO4
Cu(NO3)2 + 2NaOH \(\rightarrow\) Cu(OH)2 + 2NaNO3
Tìm giới hạn
1) \(\xrightarrow[x->3]{lim}\dfrac{x^2-5x+6}{\sqrt{2x+3}-\sqrt{4x-3}}\)
2) \(\xrightarrow[x->1]{lim}\dfrac{\sqrt{x^2+2}-\sqrt{4x-1}}{x-1}\)
3) \(\xrightarrow[x->-1]{lim}\dfrac{x-2}{x\left|x+1\right|}\)
4) \(\xrightarrow[x->a]{lim}\dfrac{x^n-a^n}{x-a}\)
5) \(\xrightarrow[x->1]{lim}(\dfrac{n}{1-x^n}-\dfrac{1}{1-x})\)
6) \(\xrightarrow[x->1]{lim}\dfrac{x^n-nx+n-1}{\left(x-1\right)^2}\)
Hoàn thành chuỗi phản ứng sau:
\(NH_3\xrightarrow[\left(1\right)]{+CuO,t^o}A\)(khí) \(\xrightarrow[\left(2\right)]{+H_2,xt,t^0}NH_3\xrightarrow[\left(3\right)]{+O_2,xt,t^0}C\xrightarrow[\left(4\right)]{+O_2}D\xrightarrow[\left(5\right)]{+O_2,H_2O}E\xrightarrow[\left(6\right)]{+NaOH}G\)
A: `N_2`
C: `NO`
D: `NO_2`
E: `HNO_3`
G: `NaNO_3`
\(\left(1\right)2NH_3+3CuO\underrightarrow{t^o}3Cu+N_2+3H_2O\)
\(\left(2\right)N_2+3H_2\underrightarrow{xt,t^o}2NH_3\)
\(\left(3\right)4NH_3+5O_2\underrightarrow{xt,t^o}6H_2O+4NO\)
\(\left(4\right)2NO+O_2\rightarrow2NO_2\)
\(\left(5\right)4NO_2+O_2+2H_2O\rightarrow4HNO_3\)
\(\left(6\right)HNO_3+NaOH\rightarrow NaNO_3+H_2O\)
Viết các phương trình phản ứng sau:
\(Cu\underrightarrow{1}CuO\underrightarrow{2}CuCl_2\xrightarrow[4]{3}Cu\left(OH\right)_2\xrightarrow[6]{5}Cu\left(NO_3\right)_2\underrightarrow{7}Fe\left(NO_3\right)_2\xrightarrow[10]{9}Fe\left(OH\right)_2\)
\(\left(1\right)Cu+\dfrac{1}{2}O_2\xrightarrow[]{t^0}CuO\\ \left(2\right)CuO+2HCl\rightarrow CuCl_2+H_2O\)
\(\left(3\right)CuCl_2+2NaOH\rightarrow Cu\left(OH\right)_2+2NaCl\\ \left(4\right)Cu\left(OH\right)_2+2HNO_3\rightarrow Cu\left(NO_3\right)_2+2H_2O\\ \left(5\right)Cu\left(NO_3\right)_2+Fe\rightarrow Fe\left(NO_3\right)_2+Cu\\ \left(6\right)Fe\left(NO_3\right)_2+2NaOH\rightarrow Fe\left(OH\right)_2+2NaNO_3\)
Hoàn thành chuỗi biến hóa:
\(CH_4\xrightarrow[\left(1\right)]{1500^oC}A\underrightarrow{\left(2\right)}B\underrightarrow{\left(3\right)}C\xrightarrow[\left(4\right)]{+A}D\xrightarrow[\left(5\right)]{+NaOH}\left[{}\begin{matrix}E\underrightarrow{\left(6\right)}C\\B\underrightarrow{\left(7\right)}F\end{matrix}\right.\)