Question

Dau coroana, este urgent
Egalati redox ecuatiile chimice

1. H2S + Cl2 → HCl + S

2. C+ H2O → CO + H2

3. S + HNO3 → SO2 + NO + H2O

4. KMnO4 + HCl → MnCl2 + KCl + H20 +Cl2

5. Cl2 + NaOH → NaClO + H2O

6. KI + MnO2 + H2SO4 → K2SO4 + I2 +H2O

Answer 1

Răspuns:

1. H2S + Cl2 → 2HCl + S

S-² - 2 e - → S⁰  (oxidare agent reducator)

2 Cl ⁰  + 2 e - → 2 Cl -¹   (reducere agent oxidant )

2. C+ H2O → CO + H2

C⁰ - 2 e - → C²  (oxidare agent reducator)

2 H ¹  + 2 e - → 2 H⁰    (reducere agent oxidant )

3. 3S + 4HNO3 → 4SO2 + 3NO + 2H2O

3 S⁰  - 12 e - → 3 S⁴    (oxidare agent reducator)

4 N⁵  + 12 e - → 4 N²    (reducere agent oxidant )

4. 2KMnO4 + 16HCl →2MnCl2 + 2KCl + 8H20 +5Cl2

Mn⁷ + 5 e - → Mn²  (reducere agent oxidant)×2

 Cl -¹  - 2 e - →  Cl⁰    (oxidare agent reducator)×5

2Mn⁷ + 10 e - →2 Mn² 

5 Cl -¹  - 10 e - → 5 Cl⁰  

5. Cl2 + 2NaOH →NaCl+ NaClO + H2O

Cl ⁰ - 1 e - → Cl ¹ (oxidare agent reducator)

Cl⁰ + 1e - → Cl -¹ (reducere agent oxidant)

6. 2KI  + 2H2SO4 + MnO2 → MnSO4 + K2SO 4 + I2  + 2H2O 

Mn⁴ + 2 e - → Mn²  (reducere agent oxidant )

2 I -¹  - 2 e - → 2 I⁰    (oxidare agent reducator)