1. Закончите определения

Окислительно-восстановительная реакция – это_______________________

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Восстановитель – это______________________________________________

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Окислитель – это _________________________________________________

Восстановление – это_____________________________________________

2.Методом электронного баланса составьте уравнения окислительно-восстановительных реакции, которые протекают по схемам:

1. K₂Cr₂O₇ + FeSO₄ + H₂SO₄ → Fe₂(SO₄)₃ + K₂SO₄ + Cr₂(SO₄)₃ + H₂O

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2. K₂Cr₂O₇ + HCl → Cl₂ + KCl + CrCl₃ + H₂O

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3. Cu + HNO₃(конц.) → Cu(NO₃)₂ + NO₂­ + H₂O

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4. Ag + HNO₃(конц.) → AgNO₃ + NO­ + H₂O

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5. Ca + HNO₃(оч.разб.) → Ca(NO₃)₂ + NH₄NO₃ + H₂O

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6. FeS₂ + HNO₃→Fe(NO₃)₃ + H₂SO₄ + NO + H₂O

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7. FeO + HNO₃→ Fe(NO₃)₃ + NO₂ + H₂O

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8. P + HNO₃ →H₃PO₄ + H₂O + NO₂

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9. P + HNO₃+ H₂O →H₃PO₄ + NO

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10. Zn + HNO₃ → Zn(NO₃) ₂ + N₂ + H₂O

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11. Zn + H₂SO₄ →ZnSO₄ + H₂S + H₂O

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12. HI + H₂SO₄ → I₂ + H₂S + H₂O

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13. KNO₂ + KMnO₄+ H₂SO₄ → KNO₃+ K₂SO₄+MnSO₄ + H₂O

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14. Na₂SO₃+ KMnO₄+ H₂O → Na₂SO₄+ MnO₂ + KOH

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15. PH₃ + KMnO₄+ H₂SO₄ → H₃PO₄ + K₂SO₄ + MnSO₄ + H₂O

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16. FeSO₄ + KMnO₄ + H₂SO₄ → Fe₂(SO₄)₃ + MnSO₄ + K₂SO₄ + H₂O

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17. H₂S+ KMnO₄+ H₂SO₄ → MnSO₄ + K₂SO₄ + H₂O

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18. HCl + K₂Cr₂O₇ → KCl + CrCl₃ + Cl₂ + H₂O

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19. KNO₂ + K₂Cr₂O₇ + H₂SO₄ →KNO₃ + K₂SO₄ + Cr₂(SO₄)₃ + H₂O

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20. KMnO₄ +MnSO₄+H₂O→MnO₂+K₂SO₄+H₂SO₄

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21. KNO₂+ KMnO₄+ H₂O→ MnO₂+ KNO₃+ KOH

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22. К₂SO₃+KOH+ KMnO₄ → К₂SO₄+ K₂MnO₄+ H₂O

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