Question

Cân bằng PTHH : 

a) Fe + HNO₃ ------- Fe(NO₃)₃ + N₂O + H₂O 

b) Fe + HNO₃ -------- Fe(NO₃)₃ + N₂ + H₂O 

c) Mg + HNO₃ --------- Mg(NO₃)₂  + NO + H₂O 

d) FeO + HNO₃ -------- Fe(NO₃)₂ + N₂O + H₂O

e) Fe₃O₄ +HNO₃ ------- Fe(NO₃)₃ + NO + H₂O 

Mọi người thường dùng cách cân bằng nào cho dễ ạ 

Answer 1

`a)8Fe + 30HNO_3 -> 8Fe(NO_3)_3 + 3N_2 O + 15H_2 O`

`b)10Fe + 36HNO_3 -> 10Fe(NO_3)_3 +3N_2 + 18H_2 O`

`c)3Mg + 8HNO_3 -> 3Mg(NO_3)_2 + 2NO + 4H_2 O`

Sửa: `d)8FeO + 26HNO_3 -> 8Fe(NO_3)_3 + N_2 O + 13H_2 O`

`e)3Fe_3 O_4 + 28HNO_ ->9 Fe(NO_3)_3 + NO + 14H_2 O`

Answer 2

a) \(8Fe+30HNO_3\left(\text{loãng}\right)\xrightarrow[]{}8Fe\left(NO_3\right)_3+3N_2O\uparrow+15H_2O\)

b) \(5Fe+12HNO_3\left(\text{loãng}\right)\xrightarrow[]{}5Fe\left(NO_3\right)_3+N_2\uparrow+6H_2O\)

c) \(3Mg+8HNO_3\left(\text{loãng}\right)\xrightarrow[]{}3Mg\left(NO_3\right)_2+2NO\uparrow+4H_2O\)

d) \(FeO+4HNO_3\left(\text{loãng}\right)\xrightarrow[]{}Fe\left(NO_3\right)_3+NO_2+2H_2O\)

e) \(3Fe_3O_4+28HNO_3\left(\text{loãng}\right)\xrightarrow[]{}9Fe\left(NO_3\right)_3+NO\uparrow+14H_2O\)