Mg+HN03(loãng)->Mg(NO3)2 + NH4NO3 + H20 cân bằng với cân bằng electron dùm mình với ạ
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1, 4Mg + 10HNO3 loãng------> 4Mg(NO3)2 + N2O + 5H2O
2, 10Al + 36HNO3 loãng------> 10Al(NO3)3 + 3N2 + 18H2O
3, 4Mg+ 10HNO3 loãng--------> 4Mg(NO3)2+ NH4NO3 + 3H2O
4, 3Fe3O4+ 28HNO3 loãng--------> .9Fe(NO3)3 +NO + 14H2O
5, 8FeS + 8 H2SO4 đặc------> 3Fe2(S04)3 + SO2+8H2
6, FeS2 + 18HNO3 đặc -------> Fe(NO3)3+ 15NO2 + 2H2SO4 + 7H2O
1, 4Mg+10HNO3 ----->4Mg(NO3)2+N2O+5H20
Quá trình khử: 2NO3− + 10H+ + 8e− = N2O + 5H
Quá trình oxy hoá Mg − 2e− = Mg2+
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Câu 2:
\(n_{AgNO_3}=\dfrac{25,5}{170}=0,15(mol)\\ PTHH:NaCl+AgNO_3\to AgCl\downarrow +NaNO_3\\ \Rightarrow m_{NaCl}=0,15.58,5=8,775(g)\)
Câu 3:
\(a,\)Đặt \(\begin{cases} n_{Mg}=x(mol)\\ n_{Zn}=y(mol) \end{cases} \Rightarrow 24x+65y=15,75(1)\)
\(PTHH:Mg+2HCl\to MgCl_2+H_2\\ Zn+2HCl\to ZnCl_2+H_2\\ \Rightarrow 95x+136y=44,15(2)\\ (1)(2)\Rightarrow \begin{cases} x=0,25(mol)\\ y=0,15(mol) \end{cases} \Rightarrow \begin{cases} \%_{Mg}=\dfrac{0,25.24}{15,75}.100\%=38,1\%\\ \%_{Zn}=100\%=38,1\%=61,9\% \end{cases} \)
\(b,\Sigma n_{HCl}=2n_{Mg}+2n_{Zn}=0,8(mol)\\ \Rightarrow m_{dd_{HCl}}=\dfrac{36,5.0,8}{10\%}=292(g)\)
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\(a,4Mg+10HNO_3\to 4Mg(NO_3)_2+NH_4NO_3\uparrow+3H_2O\\ b,2Fe_xO_y+(6x-2y)H_2SO_4\to xFe_2(SO_4)_3+(3x-2y)SO_2\uparrow+(6x-2y)H_2O\\ c,3Fe_xO_y+(12x-2y)HNO_3\to 3xFe(NO_3)_3+(3x-2y)NO\uparrow+(6x-y)H_2O\\ d,2FeO+4H_2SO_4\to Fe_2(SO_4)_3+SO_2\uparrow+4H_2O\\ e,3Fe_3O_4+28HNO_3\to 9Fe(NO_3)_3+NO\uparrow+14H_2O\)
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b)
$S^{-2} + 2e \to S^0$
$N^{+5} \to N^{+2} + 3e$
$3H_2S + 2HNO_3 \to 3S + 2NO + 4H_2O$
c)
$Mg^0 \to Mg^{+2} + 2e$
$N^{+5} + 3e \to N^{+2}$
$3Mg + 8HNO_3 \to 3Mg(NO_3)_2 + 2NO + 4H_2O$
e)
$Al^0 \to Al^{+3} + 3e$
$S^{+6} + 2e \to S^{+4}$
$2Al + 6H_2SO_4 \to Al_2(SO_4)_3 + 3SO_2 + 6H_2O$
g)
$Cu_2S \to 2Cu^{+2} + S^{+6} + 10e$
$N^{+5} + 3e \to N^{+2}$
$3Cu_2S + 16HNO_3 \to 3Cu(NO_3)_2 + 3CuSO_4 + 10NO + 8H_2O$
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1) 6P + 5KClO3 --> 3P2O5 + 5KCl
QT oxh | 2P0 -10e-->P2+5 | x3 |
QT khử | Cl+5 +6e--> Cl- | x5 |
2) 4NO2 + O2 + 2H2O --> 4HNO3
Qt oxh | N+4 -1e-->N+5 | x4 |
Qt khử | O20 +4e--> 2O-2 | x1 |
3) Fe3O4 + 4H2 --to--> 3Fe + 4H2O
QT khử | \(Fe_3^{+\dfrac{8}{3}}+8e\rightarrow3Fe^0\) | x1 |
QT oxh | H20 -2e--> H2+ | x4 |
4) 4Mg + 10HNO3 --> 4Mg(NO3)2 + NH4NO3 + 3H2O
Qt oxh | Mg0-2e-->Mg+2 | x4 |
Qt khử | N+5 +8e--> N-3 | x1 |
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a. 4Mg + 10HNO3 ---> 4Mg(NO3)2 + NH4NO3 + 3H2O
b. 8Na + 5H2SO4 ---> 4Na2SO3 + 5H2S + 4H2O
c. 2FexOy + (3x - 2y)H2SO4 ---> xFe2(SO4)3 + 2ySO2 + (3x - 2y)H2O
d. 2HNO3 + 3H2S ---> 2NO + 3S + 4H2O
e. 3FexOy + (12x - 2y)HNO3 ---> 3xFe(NO3)3 + (3x - 2y)NO + (6x - y)H2O
f. Fe + 6HNO3 ---> Fe(NO3)3 + 3NO2 + 3H2O
g. 4FeS2 + 11O2 ---to---> 2Fe2O3 + 8SO2
h. 2FeO + 4H2SO4 ---> Fe2(SO4)3 + SO2 + 4H2O