Fe2O3+_______NaNO3+____NaOH==____Na2FeO4+____NaNO2+____H2O
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![Fe2O3+_______NaNO3+____NaOH==____Na2FeO4+____NaNO2+____H2O](/uploads/image/z/8183127-39-7.jpg?t=Fe2O3%2B_______NaNO3%2B____NaOH%3D%3D____Na2FeO4%2B____NaNO2%2B____H2O)
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Fe2O3+_______NaNO3+____NaOH==____Na2FeO4+____NaNO2+____H2O
Fe2O3+_______NaNO3+____NaOH==____Na2FeO4+____NaNO2+____H2O
Fe2O3+_______NaNO3+____NaOH==____Na2FeO4+____NaNO2+____H2O
Fe2O3+___3___NaNO3+_4___NaOH==__2__Na2FeO4+__3__NaNO2+__2__H2O
__1__Fe2O3+___3___NaNO3+__4_NaOH==___2_Na2FeO4+__3__NaNO2+__2__H2O
3 4 2 3 2
___a__Fe2O3+___b____NaNO3+__c__NaOH
-->_d___Na2FeO4+_e___NaNO2+_f___H2O
左边:Fe:2a
Na:b+c
O:3a+3b+c
N:b
H:c
右边:
Fe:d
Na:2d+e
O:4d+2e+f
N:e
H:2f
列方程:
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___a__Fe2O3+___b____NaNO3+__c__NaOH
-->_d___Na2FeO4+_e___NaNO2+_f___H2O
左边:Fe:2a
Na:b+c
O:3a+3b+c
N:b
H:c
右边:
Fe:d
Na:2d+e
O:4d+2e+f
N:e
H:2f
列方程:
2a=d
b+c=2d+e
3a+3b+c=4d+2e+f
b=e
c=2f
和和~~~
a=1 b=3 c=4 d=2 e=3 f=2
最原始的方法,如果实在配不出,用这个方法很实用哦.
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