RÄspuns :
RÄspuns:
1. H2S + Cl2 ā 2HCl + S
S-Ā² - 2 e - ā Sā° (oxidare agent reducator)
2 Cl ā° + 2 e - ā 2 Cl -Ā¹ (reducere agent oxidant )
2. C+ H2O ā CO + H2
Cā° - 2 e - ā CĀ² (oxidare agent reducator)
2 H Ā¹ + 2 e - ā 2 Hā° (reducere agent oxidant )
3. 3S + 4HNO3 ā 4SO2 + 3NO + 2H2O
3 Sā° - 12 e - ā 3 Sā“ (oxidare agent reducator)
4 Nāµ + 12 e - ā 4 NĀ² (reducere agent oxidant )
4. 2KMnO4 + 16HCl ā2MnCl2 + 2KCl + 8H20 +5Cl2
Mnā· + 5 e - ā MnĀ² (reducere agent oxidant)Ć2
Cl -Ā¹ - 2 e - ā Clā° (oxidare agent reducator)Ć5
2Mnā· + 10 e - ā2 MnĀ²
5 Cl -Ā¹ - 10 e - ā 5 Clā°
5. Cl2 + 2NaOH āNaCl+ NaClO + H2O
Cl ā° - 1 e - ā Cl Ā¹ (oxidare agent reducator)
Clā° + 1e - ā Cl -Ā¹ (reducere agent oxidant)
6. 2KI + 2H2SO4 + MnO2 ā MnSO4 + K2SO 4 + I2 + 2H2O
Mnā“ + 2 e - ā MnĀ² (reducere agent oxidant )
2 I -Ā¹ - 2 e - ā 2 Iā° (oxidare agent reducator)
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