Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
a) A là O2; B là SO3
2KClO3\(\xrightarrow[]{to}\) 2KCl+ 3O2
S+O2\(\xrightarrow[]{to}\) SO2
2SO2+ O2\(\xrightarrow[]{to}\) 2SO3
SO3+ H2O\(\xrightarrow[]{}\) H2SO4
b) 2KMnO4\(\underrightarrow{to}\) K2MnO4+ MnO2+ O2
2Cu+ O2\(\xrightarrow[]{to}\) 2CuO
CuO+ H2\(\xrightarrow[]{to}\) Cu+ H2O
2Na+ 2H2O\(\xrightarrow[]{}\) 2NaOH+ H2
c) 3Fe+ 2O2\(\xrightarrow[]{to}\) Fe3O4
Fe3O4+ 4H2\(\xrightarrow[]{to}\) 3Fe+ 4H2O
2H2O\(\xrightarrow[]{đp}\) 2H2+ O2
PbO+ H2\(\xrightarrow[]{to}\) Pb+ H2O
d) 2KClO3\(\xrightarrow[]{to}\) 2KCl+ 3O2
2Pb+ O2\(\xrightarrow[]{to}\) 2PbO
PbO+ H2\(\xrightarrow[]{to}\) Pb+ H2O
2K+ 2H2O\(\xrightarrow[]{}\) 2KOH+ H2
e) 2H2O\(\xrightarrow[]{đp}\) 2H2+ O2
2Zn+ O2\(\xrightarrow[]{to}\) 2ZnO
ZnO+ H2\(\xrightarrow[]{to}\) Zn+ H2O
P2O5+ 3H2O\(\xrightarrow[]{}\) 2H3PO4
g) S+ O2\(\xrightarrow[]{to}\) SO2
2SO2+ O2\(\xrightarrow[]{to}\) 2SO3
SO3+ H2O\(\xrightarrow[]{}\) H2SO4
Mg+ H2SO4\(\xrightarrow[]{}\) MgSO4+ H2
h) 2Na+ 2H2O\(\xrightarrow[]{}\) 2NaOH+ H2
2H2+ O2\(\xrightarrow[]{to}\) 2H2O
CaO+ H2O\(\xrightarrow[]{}\) Ca(OH)2
Ca(OH)2+ CO2\(\xrightarrow[]{}\) CaCO3+ H2O
a) (1) 2 KClO3 -to-> 2 KCl + 3 O2
(2) 2 O2 + 3 Fe -to-> Fe3O4
(3) Fe3O4 + 4CO -to-> 3 Fe + 4CO2
(4) Fe + H2SO4 -> FeSO4 + H2
b) (1) 2 KMnO4 -to-> K2MnO4 + MnO2 + O2
(2) O2 + 2 H2 -to-> 2 H2O
(3) H2O - đp -> H2 + 1/2 O2
(4) 4 H2 + Fe3O4 -to-> 3 Fe + 4 H2O
(5) Fe + 2HCl -> FeCl2 + H2
a/ KClO3--->O2--->Fe3O4--->Fe
b/KMnO4--->O2--->CuO--->Cu c/ KClO3--->O2--->Fe2O3--->Fe
----
a) (1) 2 KClO3 -to-> 2 KCl + 3 O2
(2) 2 O2 + 3 Fe -to-> Fe3O4
(3) Fe3O4 + 4 CO -to-> 4 CO2 + 3 Fe
b) (1) 2 KMnO4 -to-> K2MnO4 + MnO2 + O2
(2) Cu + 1/2 O2 -to-> CuO
(3) CuO + CO -to-> CO2 + Cu
c) (1) 2 KClO3 -to-> 2 KCl + 3 O2
(2) 3 O2 + 4 Fe -> 2 Fe2O3
(3) Fe2O3 +3 CO -to-> 3 CO2 + 2 Fe
a)\(2KCLO3-->2KCl+3O2\)
\(3Fe+2O2-->Fe3O4\)
\(Fe3O4+4H2-->3Fe+4H2O\)
b)\(2KMNO4-->K2MnO4+MNO2+O2\)
\(2Cu+O2-->2CuO\)
\(CuO+H2-->Cu+H2O\)
c)\(2KCLO3--.2KCl+3O2\)
\(3Fe+2O2-->Fe3O4\)
\(Fe2O3+3H2-->2Fe+3H2O\)
Bài 8: Có những sơ đồ phản ứng hóa học sau:
\n\n\\n\\n
\n\n1. Mg+2HCl---->MgCl2+H2 (oxi hoá khử0
\n\n\\n\\n
\n\n2.2 H2+O2--to--->2H2O (hoá hợp)
\n\n\\n\\n
\n\n3. PbO+CO2---->Pb+H2O(ko pứ)
\n\n\\n\\n
\n\n4. KClO3---to->KCl+O2 (phân huỷ)
\n\n\\n\\n
\n\n5. CaCO3+CO2+H2O---->Ca(HCO3)2 (hoá hợp)
\n\n\\n\\n
\n\n6. Fe+O2--to-->Fe3O4(hoá hợp)
\n\n\\n\\n
\n\n7. CuO+CO-to--->Cu+CO2(oxi hoá khử)
\n\n\\n\\n
\n\n8. Fe+CuSO4---->FeSO4+Cu(trao đổi)
\n\n\\n\\n
\n\n9. 2Al+3H2SO4---->Al2(SO4)3 +3H2(oxi hoá khử)
\n\n\\n\\n
\n\n10. Zn+Cl2----to>ZnCl2 (hoá hợp)
\n\n\\n\\n
\n\nHãy lập phương trình hóa học của các phản ứng trên và cho biết \"Phản ứng thuộc loại nào?\".
\n
a)
(left(1 ight)2KMnO_4underrightarrow{t^o}K_2MnO_4+MnO_2+O_2\ left(2 ight)O_2+2Znunderrightarrow{t^o}2ZnO\ left(3 ight)ZnO+2HCl ightarrow ZnCl_2+H_2O\left(4 ight) 2O_2+3Feunderrightarrow{t^o}Fe_3O_4\ left(5 ight)Fe_3O_4+H_2underrightarrow{t^o}Fe+H_2O\ left(6 ight)Fe+H_2SO_4 ightarrow FeSO_4+H_2)
b)
(left(1 ight)2H_2Ounderrightarrow{đp}2H_2+O_2\ left(2 ight)O_2+2Cuunderrightarrow{t^o}2CuO\ left(3 ight)CuO+H_2underrightarrow{t^o}Cu+H_2O\ left(4 ight)2H_2Ounderrightarrow{đp}2H_2+O_2\ left(5 ight)H_2+FeOunderrightarrow{t^o}Fe+H_2O\ left(6 ight)3Fe+2H_3PO_4 ightarrow Feleft(PO_4 ight)_2+3H_2)
\(2KMnO_4\underrightarrow{t^0}K_2MnO_2+MnO_2+O_2\)
\(Zn+O_2\underrightarrow{t^0}ZnO\)
\(Zn+2HCl\underrightarrow{t^0}ZnCl_2+H_2\)
\(3Fe+2O_2\underrightarrow{t^0}Fe_3O_4\)
\(4H_2 +Fe_3O_4\underrightarrow{t^0}3Fe+4H_2O\)
\(Fe+H_2SO_4\underrightarrow{t^0}FeSO_4+H_2\)
1, 4Al + 3O2 \(\rightarrow\)2Al2O3
2, 2KMnO4 \(\rightarrow\)K2MnO4 + MnO2 + O2
3, 2KClO3 \(\rightarrow\)2KCl + 3O2
4, CuO + H2 \(\rightarrow\)Cu + H2O
5,2 K+H2O \(\rightarrow\)K2O + H2
6, H2 + Fe3O4 \(\rightarrow\)Fe + H2O
7, 2Al + 3H2SO4 \(\rightarrow\)Al2(SO4)3 + 3H2
, Mg + 2HCl \(\rightarrow\)MgCl2 + H2
9, 2Na + 2H2O \(\rightarrow\)2NaOH + H2
10, CaO + H2O \(\rightarrow\)Ca(OH)2
11, P2O5 + 3H2O \(\rightarrow\)2H3PO4
\(a,Cu+2AgNO_3\rightarrow Cu\left(NO_3\right)_2+2Ag\)
b, 3Cl2 + 6KOH ---> 5KCl + KClO3 + 3H2O
\(c,2KClO_3\rightarrow^{t^o}2KCl+3O_2\)
\(d,Fe_3O_4+4H_2\rightarrow4H_2O+3Fe\)
\(e,CaO+H_2O\rightarrow Ca\left(OH\right)_2\)
\(f,FeCl_2+H_2\rightarrow Fe+2HCl\)
\(g,P_2O_5+3H_2O\rightarrow2H_3PO_4\)
\(h,2KMnO_4\rightarrow^{t^o}K_2MnO_4+MnO_2+O_2\)
\(i,2Na+2H_2O\rightarrow2NaOH+H_2\)
Câu F chưa chính xác nhé em: FeO + H2 --> Fe + H2O
Các câu còn lại thì đúng hết rồi
a) \(2Al+3Cl_2\rightarrow2AlCl_3\)
b) \(3Fe+2O_2\rightarrow Fe_3O_4\)
c) \(CuO+2HCl\rightarrow CuCl_2+H_2O\)
d) \(2Mg+O_2\rightarrow2MgO\)
e) \(Mg+2HCl\rightarrow MgCl_2+H_2\)
g) \(Zn+CuSO_4\rightarrow ZnSO_4+Cu\)
h) \(2Zn+O_2\rightarrow2ZnO\)
k) Giống câu e nha, lặp đề
m) \(Fe+CuSO_4\rightarrow FeSO_4+Cu\)
n) \(2KClO_3\rightarrow2KCl+3O_2\)
p) \(O_2+2H_2\rightarrow2H_2O\)
Bài 1 : Hoàn thành các phương trình
1, Pb + 2HCl \(\rightarrow\)PbCl2 + H2\(\uparrow\)
2, PbO + H2SO4 \(\rightarrow\)PbSO4 + H2O
3, Ba + H2SO4 \(\rightarrow\)BaSO4\(\downarrow\) +H2\(\uparrow\)
4, Ba + 2HCl\(\rightarrow\)BaCl2+H2\(\uparrow\)
5, K + H2O \(\rightarrow\)KOH + H2 \(\uparrow\)
6, Na + H2O \(\rightarrow\) NaOH + H2 \(\uparrow\)
7, 3Fe + 2O2 \(\underrightarrow{t^o}\) Fe3O4
8, 2Al(OH)3 \(\underrightarrow{t^o}\) Al2O3 + 3H2O
9, 2Fe(OH)3 \(\underrightarrow{t^o}\) Fe2O3 + 3H2O
10, Ca(OH)2 + CO2 \(\rightarrow\)CaCO3 + H2O
thanks bạn