cân bằng pthh
Al+HNO3 ------> Al2(NO3)3+N2+N2O+H2O
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Đáp án C.
Ta có: tỉ lệ số mol giữa N2O và N2 là 3: 2
Pt sau cân bằng: 44Al + 162HNO3 ® 44Al(NO3)3 + 6N2 + 9N2O + 81H2O.
8Al + 30HNO3 → 8Al(NO3)3 + 3N2O + 15H2O
8 × || Al → Al3+ + 3e
3 × || 2N+5 + 8e → 2N+4 (N2O)
10Al + 36HNO3 → 10Al(NO3)3 + 3N2 + 18H2O
Sự oxi hóa: Al → Al+3 + 3e
Sự khử: 2N+5 + 10e → N2
4Mg + 10HNO3 → 4Mg(NO3)2 + N2O + 5H2O
4 × || Mg → Mg2+ + 2e
1 × || 2N+5 + 8e → 2N+4 (N2O)
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.
1,Mg + 2H2SO4 = MgSO4 + SO2 + 2H2O
2,Ca + 2H2SO4 = CaSO4 + SO2 + 2H2O
3 Al + 6HNO3 = Al(NO3)3 + 3NO2 + 3H2O
4,Al + 4HNO3 = Al(NO3)3 + NO + 2H2O
5,8Al + 30HNO3 = 8Al(NO3)3 + 3N2O + 15H2O
6,10Al + 36HNO3 = 10Al(NO3)3 + 3N2 + 18H2O
7,8Al + 10HNO3 = 8Al(NO3) + NH4NO3 + 3H2O
8,8Al + 15H2SO4 = 4Al2(SO4)3 + 3H2S + 12H2O
9, pthh ghi sai thiếu H
10,2Fe + 4H2SO4 = Fe2(SO4)3 + S + 4H2O
11,Fe + 6HNO3 = Fe(NO3)3 + 3NO2 + 3H2O
12,Fe + 4HNO3 = Fe(NO3)3 + NO + 2H2O
13,3Ca + 8HNO3 = 3Ca(NO3)2 + 2NO + 4H2O
14,KClO3 + 6HCl = KCl + 3Cl2 + 3H2O
15, cthh ghi sai hay sao ý
16,MnO2 + 4HCl = MnCl2 + Cl2 + 2H2O
17,Fe3O4 + 8HCl = FeCl2 + 2FeCl3 + 4H2O
18,Fe3O4 + 4H2SO4 = FeSO4 + Fe2(SO4)3 + 4H2O
19,Fe3O4 + 4CO = 3Fe + 4CO2
20, cthh ghi sai
cậu chép đề có vài chỗ ghi sai kí hiệu hóa học nữa đó, làm mik tìm mỏi cả mắt
cân bằng các PTHH sau
4NO2+O2+2H2O-->4HNO3
6P+5KClO3-->3 P2O5 +5KCl
2KMnO4 + 8HCl → 2KCl + 2MnO2 + 3Cl2 + 4H2O
FexOy+(x-y)CO--->xFeO+(x-y)CO2
2Al + 6HNO3 → 2Al(NO3)3 + -6NO + 3N2O + 3H2O
46Al + 168HNO3 → 46Al(NO3)3 + 6N2O + 9N2 + 84H2O