Are these reactions redox or not? Indicate the oxidizing agent and the reducing agent, make an electronic balance

Are these reactions redox or not? Indicate the oxidizing agent and the reducing agent, make an electronic balance. Arrange the odds. a) NH3 + SO2 → N2 + S + H2O b) NH3 + HCl → NH4Cl c) Zn + HNO3 (conc.) → Zn (NO3) 2 + NO2 + H2O d) ZnSO4 + BaCl2 → Ba SO4 + Zn Cl2

a) is an OВР;
N (3-) H (+) 3 + S (4+) O (2-) 2 => N (0) 2 + S (0) + H (+) 2O (2-);
reducing agent – 2N (3-) – 6e -> N (0) 2 | 2 – oxidation;
oxidizing agent – S (4+) + 4e -> S (0) | 3 – recovery;
4NH3 + 3SO2 => 2N2 + 3S + 6H2O;

b) is not an OВР;
N (3-) H (+) 3 + H (+) Cl (-) => N (3-) H (+) 4Cl (-);

c) is an OВР;
Zn (0) + H (+) N (5+) O (2-) 3 (conc.) => Zn (2 +) (N (5+) O (2-) 3) 2 + N (4+ ) O (2-) 2 + H (+) 2O (2-);
reducing agent – Zn (0) – 2e -> Zn (2+) | 1 – oxidation;
oxidizing agent – N (5+) + 1e -> N (4+) | 2 – recovery;
Zn + 4HNO3 (conc.) => Zn (NO3) 2 + 2NO2 + 2H2O;

d) is not an OВР;
Zn (2+) S (6+) O (2-) 4 + Ba (2+) Cl (-) 2 => Ba (2+) S (6+) O (2-) 4 + Zn (2+ ) Cl (-) 2.



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