FexOy + HNO3 ➙ Fe(NO3) + NO2 +H2O
Thăng bằng electron
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Bạn xem lại PT 1 và 3 nhé.
\(\overset{0}{Al}+H\overset{+5}{N}O_3\rightarrow\overset{+3}{Al}\left(NO_3\right)_3+\overset{0}{N_2}+H_2O\)
\(\overset{0}{Al\rightarrow}\overset{+3}{Al}+3e|\times10\)
\(2\overset{+5}{N}+10e\rightarrow\overset{0}{N_2}|\times3\)
⇒ 10Al + 36HNO3 → 10Al(NO3)3 + 3N2 + 18H2O
\(\overset{^{+2y/x}}{Fe_x}O_y+H\overset{+5}{N}O_3\rightarrow\overset{+3}{Fe}\left(NO_3\right)_3+\overset{+4}{N}O_2+H_2O\)
\(\overset{^{+2y/x}}{Fe_x}\rightarrow x\overset{+3}{Fe}+\left(3x-2y\right)e|\times1\)
\(\overset{+5}{N}+e\rightarrow\overset{+4}{N}|\times\left(3x-2y\right)\)
⇒ FexOy + (6x-2y)HNO3 → xFe(NO3)3 + (3x-2y)NO2 + (3x-y)H2O
Quá trình:
\(Fe_x^{^{+\dfrac{2y}{x}}}\rightarrow xFe^{+3}+\left(3x-2y\right)|\times4\)
\(N^{+5}+3e\rightarrow N^{+2}|\times\left(3x-2y\right)\)
\(N^{+5}+1e\rightarrow N^{+4}|\times\left(3x-2y\right)\)
PT: \(4Fe_xO_y+\left(18x-4y\right)HNO_3\rightarrow4xFe\left(NO_3\right)_3+\left(3x-2y\right)NO+\left(3x-2y\right)NO_2+\left(9x-2y\right)H_2O\)
2FexOy +(6x-2y)H2SO4 ===> xFe2(SO4)3 +(3x-2y)SO2 +(6x-2y)H2O
FexOy +(6x-2y) HNO3 ===> xFe(NO3)3 +(3x-2y)NO2 +(3x-y) H2O
Al->Al+3 +3e________________ .(5x-2y)
xN+5 +(5x-2y)e\(\rightarrow\)xN+2y/x________.3
\(\Rightarrow\)(5x-2y)Al+(18x-3y)HNO3\(\rightarrow\)(9x-1,5y)H2O+3NxOy+(5x-2y)Al(NO3)3
xFe+2y/x \(\rightarrow\)xFe+3 + (3x-2y)e .1
N+5 +1e\(\rightarrow\)N+4 ____________ .(3x-2y)
\(\rightarrow\)FexOy+(6x-2y)HNO3\(\rightarrow\)(3x-y)H2O+xFe(NO3)3+(3x-2y)NO2
2Fe(OH)2 + 4H2SO4 ---> Fe2(SO4)3 + SO2 + 6H2O
4Cu2O + 18HNO3 ---> 8Cu(NO3)2 + NH4NO3 + 7H2O
4FexOy + (12x-4y) H2SO4 ---> 2x Fe2(SO4)3 + (6x-4y) SO2 + (12x-4y) H2O
FexOy + (4x-2y) HNO3 ---> x Fe(NO3)2 + (2x-2y) NO2 + (2x-y) H2O
(5t-2z) FexOy + (18xt - 2yt - 6xz) HNO3---> (5tx-2zx) Fe(NO3)3 + (3x-2y) NtOz + (9xt-yt-3xz) H2O
a)\(3M+4nHNO_3-->3M\left(NO_3\right)_n+nNO+2nH_2O\)
b)
\(2M+2nH_2SO_4-->M_2\left(SO_4\right)_n+nSO_2+2nH_2O\)
c)
\(8M+30HNO_3-->8M\left(NO_3\right)_3+3N_2O+15H_2O\)
d)
\(8M+10nHNO_3-->8M\left(NO_3\right)_n+nN_2O+5nH_2O\)
e)\(\left(5x-2y\right)Fe+\left(15x-3y\right)HNO_3-->\left(5x-2y\right)Fe\left(NO_3\right)_3+3N_xO_y+\left(\dfrac{15x-3y}{2}\right)H_2O\)
f) \(3Fe_xO_y+\left(6x+2y\right)HNO_3-->3xFe\left(NO_3\right)_3+\left(2y-3x\right)NO+\left(3x+y\right)H_2O\)
g)\(Fe_xO_y+\left(6x-2y\right)HNO_3-->xFe\left(NO_3\right)_3+\left(3x-2y\right)NO_2+\left(3x-y\right)H_2O\) h)\(Fe_xO_y+2yHCl-->xFeCl_{\dfrac{2y}{x}}+yH_2O\)
i)\(2Fe_xO_y+2yH_2SO_4-->xFe_2\left(SO_4\right)_{\dfrac{2y}{x}}+2yH_2O\)
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 \(\begin{cases} n_{Mg}=x(mol)\\ n_{Zn}=y(mol) \end{cases} \Rightarrow 24x+65y=15,75(1)\)
\(PTHH:Mg+2HCl\to MgCl_2+H_2\\ Zn+2HCl\to ZnCl_2+H_2\\ \Rightarrow 95x+136y=44,15(2)\\ (1)(2)\Rightarrow \begin{cases} x=0,25(mol)\\ y=0,15(mol) \end{cases} \Rightarrow \begin{cases} \%_{Mg}=\dfrac{0,25.24}{15,75}.100\%=38,1\%\\ \%_{Zn}=100\%=38,1\%=61,9\% \end{cases} \)
\(b,\Sigma n_{HCl}=2n_{Mg}+2n_{Zn}=0,8(mol)\\ \Rightarrow m_{dd_{HCl}}=\dfrac{36,5.0,8}{10\%}=292(g)\)
\(Fe^{+\dfrac{2y}{x}}_x-\left(3x-2y\right)e\rightarrow xFe^{+3}\) x 1
\(N^{+5}+e\rightarrow N^{+4}\) ........................x ( 3x - 2y )
\(Fe_xO_y+\left(6x-2y\right)HNO_3\rightarrow xFe\left(NO_3\right)_3+\left(3x-2y\right)NO_2+\left(3x-y\right)H_2O\)