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\(3Cu+8HNO_3\rightarrow3Cu\left(NO_3\right)_2+2NO+4H_2O\)
\(10Al+36HNO_3\rightarrow10Al\left(NO_3\right)_3+3N_2+18H_2O\)
\(2Fe_3O_4+10H_2SO_4\rightarrow3Fe_2\left(SO_4\right)_3+SO_2+10H_2O\)
\(NH_4NO_3\rightarrow N_2O+2H_2O\)
\(NH_4NO_2\rightarrow N_2+2H_2O\)
\(2KMnO_4+16HCl\rightarrow2KCl+2MnCl_2+5Cl_2+8H_2O\)
Mk làm ví dụ 3 ý đầu nhé mấy ý sau tương tự
MnO2+HCl\(\rightarrow\)MnCl2+Cl2+H2O
Mn+4 +2e\(\rightarrow\)Mn+2_____.1
2Cl- \(\rightarrow\)Cl2+2e________.1
\(\rightarrow\)MnO2+4HCl\(\rightarrow\)MnCl2+Cl2+2H2O
Al\(\rightarrow\)Al+3 +3e ______.8
N+5 +8e\(\rightarrow\)N-3______.3
\(\rightarrow\)8Al+30HNO3\(\rightarrow\)8Al(NO3)3+3NH4NO3+15H2O
6Fe+\(\frac{8}{3}\rightarrow\)6Fe+3 +2e ___________.3
S+6 +6e\(\rightarrow\)S0 ________________ .1
\(\rightarrow\)6Fe3O4+28H2SO4\(\rightarrow\)9Fe2(SO4)3+S+28H2O
Chất khử và chất oxi hóa trong các phản ứng sau là:
a) : Chất khử : H2, chất oxi hóa O2
b) : KNO3 vừa là chất oxi hóa, vừa là chất khử.
c)
NH4NO2 vừa là chất oxi hóa, vừa là chất khử
d)
chất khử: Al, chất oxi hóa: Fe2O3
1.Al\(\rightarrow\)Al+3 +3e_______________.(5x-2y)
xN+5 +(5x-2y)e\(\rightarrow\)xN+\(\frac{2y}{x}\)______.3
\(\rightarrow\)(5x-2y)Al+(18x-6y)HNO3\(\rightarrow\)(5x-2y)Al(NO3)3+3NxOy+(9x-3y)H2O
2.M\(\rightarrow\)M+n +ne____.2
S+6 +2e\(\rightarrow\)S+4_____.n
\(\rightarrow\)2M+3nH2SO4\(\rightarrow\)2M(SO4)n+nSO2+3nH2O
3.M\(\rightarrow\)M+n +ne__________.(5x-2y)
xN+5 +(5x-2y)e\(\rightarrow\)xN+\(\frac{2y}{x}\) ____.n
\(\rightarrow\)(5x-2y)M+(6nx-2ny)HNO3\(\rightarrow\)(5x-2y)M(NO3)n+nNxOy+(3nx-ny)H2O
N+5 +3e\(\rightarrow\)N+2 __________.1
2N+5 +8e\(\rightarrow\)2N+1_________ .2
\(\rightarrow\)5N+5 +19e\(\rightarrow\)N+2 +4N+1______ .2
Zn\(\rightarrow\)Zn+2 +2e ____________ .19
\(\rightarrow\)19Zn+48HNO3\(\rightarrow\)19Zn(NO3)2+2NO+4N2O+24H2O
2N+5 +10e\(\rightarrow\)2N0 .2
2N+5+ 8e\(\rightarrow\)2N+1 .1
\(\rightarrow\)6N+5 +28e\(\rightarrow\)4N0 +2N+1 .3
Al\(\rightarrow\)Al+3 +3e _________.28
\(\rightarrow\)28Al+102HNO3\(\rightarrow\)28Al(NO3)3+6N2+3N2O+51H2O
2Fe+2 \(\rightarrow\)2Fe+3 +2e .5
Mn+7 +5e\(\rightarrow\)Mn+2 .2
\(\rightarrow\)10FeSO4+2KMnO4+2KHSO4\(\rightarrow\)5Fe2(SO4)3+2MnSO4+2K2SO4+H2O
4. (5x-2y)AL + (18x-6y)HNO3 -------> (5x-2y)AL(NO3)3 + 3NxOy +(9x-3y)H2O
5. 2M + 2nH2SO4--------> M2(SO4)n + nSO2 + 2nH2O
6. (5x-2y)M + (6nx-2ny)HNO3 -------->(5x-2y) M(NO3)n +n NxOy + (3nx-ny)H2O
7. 11Zn + 28HNO3 -------> 11Zn( NO3)2 + 2NO + 2N2O + 14H2O
8. 46AL + 168HNO3 -------;> 46AL( NO3)3 + 9N2 + 6N2O + 84H2O
9. 10FeSO4 + 2KMnO4 + 16KHSO4 ---> 5Fe2(SO4)3 +9 K2SO4 + 2MnSO4 + 8H2O.
10NH4ClO4 + 8P \(\rightarrow\) 8H3PO4 + 5Cl2 + 5N2 + 8H2O
3Cu2S + 22HNO3 \(\rightarrow\) 6Cu(NO3)2 + 3H2SO4 + 10NO + 8H2O
K2Cr2O7 + 3K2SO3 + 8KHSO4 \(\rightarrow\)8K2SO4 + Cr2(SO4)3 + 4H2O
2CrCl3 + 3Cl2 + 16NaOH \(\rightarrow\)2Na2CrO4 + 12NaCl + 8H2O
1)
N-3 \(\rightarrow\) N+2 + 5e (4x)
2O+ 4e\(\rightarrow\) 2O-2 (5x)
4NH3+ 5O2\(\underrightarrow{^{to}}\) 4NO+ 6H2O
2)
2N-3 \(\rightarrow\) N2 + 6e (2x)
2O + 4e \(\rightarrow\)2O-2 (3x)
8NH3 + 6O2\(\underrightarrow{^{to}}\)4N2+ 12H2O
3)
S-2 \(\rightarrow\) S + 2e (2x)
2O+ 4e \(\rightarrow\) 2O-2 (1x)
2H2S+ O2 \(\underrightarrow{^{to}}\)2S+ 2H2O
4)
2P \(\rightarrow\) 2P+5 +10e (6x)
Cl+5 +6e\(\rightarrow\) Cl-1 (5x)
6P+ 5KClO3 \(\underrightarrow{^{to}}\) 3P2O5+ 5KCl
a)3 Zn + 4H2SO4--> 3ZnSO4 + S + 4H2O
b) 5Mg + 12HNO3 --> 5Mg(NO3)2 + N2 + 6H2O
c) P + 5HNO3--> H3PO4 + 5NO2 + H2O
d) 3FeO + 10HNO3 -->3Fe(NO3)3 + NO +5 H2O
e) 3Fe(OH)2 + 10HNO3 --> 3Fe(NO3)3 + NO + 8H2O
NH4NO2---->2H2O+N2