Cân bằng phản ứng oxi hóa khử:
a)\(Zn+HNO_3\rightarrow Zn\left(NO_3\right)_2+N_2O+H_2O\)
b)\(Zn+HNO_3\rightarrow Zn\left(NO_3\right)_2+NO+N_2+H_2O\) (tỉ lệ \(^nNO:^nN_2=1:2\))
c)\(Zn+HNO_3\rightarrow Zn\left(NO_3\right)_2+N_2O+N_2+H_2O\) (tỉ lệ\(^nN_2O:^nN_2=1:2\))
d)\(Zn+HNO_3\rightarrow Zn\left(NO_3\right)_2+NO+NO_2+N_2+H_2O\) (tỉ lệ \(^nNO:^nN_2O:^nN_2=1:2:3\))
e)\(Zn+HNO_3\rightarrow Zn\left(NO_3\right)_2+N_2O_x+H_2O\)
a, 4Zn + 10HNO3 = 4Zn(NO3)2 + N2O + 5H2O
4x Zn - 2e -> Zn2+
1x 2N+5 + 8e -> 2N+1
b, 23Zn + 56HNO3 = 23Zn(NO3)2 + 2NO + 4N2 + 28H2O
23a x Zn - 2e -> Zn2+
2 x 5aN+5 + 23a e -> aN+2 + 4aN+0
Tối giản hệ số a = 1
c,d làm tương tự
e, (5-x)Zn+(12-2x) HNO3→(5-x)Zn(NO3)2+ N2Ox + (6-x) H2O
(5-x) x Zn - 2e -> Zn2+
1 x 2N+5 + (10-2x)e -> 2N+x
a, 4Zn + 10HNO3 = 4Zn(NO3)2 + N2O + 5H2O
4x Zn - 2e -> Zn2+
1x 2N+5 + 8e -> 2N+1
b, 23Zn + 56HNO3 = 23Zn(NO3)2 + 2NO + 4N2 + 28H2O
23a x Zn - 2e -> Zn2+
2 x 5aN+5 + 23a e -> aN+2 + 4aN+0
Tối giản hệ số a = 1
c,d làm tương tự
e, (5-x)Zn+(12-2x) HNO3→(5-x)Zn(NO3)2+ N2Ox + (6-x) H2O
(5-x) x Zn - 2e -> Zn2+
1 x 2N+5 + (10-2x)e -> 2N+x
