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zubareva45

A—>Na₂S—>Na₂SO₄–>NaOH

1.

A—>Na₂S—>Na₂SO₄

4S+8NaOH = 3Na₂S + Na₂SO₄ + 4H₂O

2.

Na₂SO₄–>NaOH

Электролиз раствора сульфата натрия:

Na₂SO₄ ⇄ 2Na⁺ + SO₄²⁻

на катоде:  

2H₂O + 2e⁻ = H₂ + 2OH⁻  

на аноде:  

2H₂O – 4e⁻ = O₂ + 4H⁺  

В растворе: Na⁺, OH⁻  (NaOH)

В растворе: H⁺, SO₄²⁻ (H₂SO₄)

Na₂SO₄ + 4H₂O + электролиз =2NaOH + H₂SO₄ + 2H₂ ↑ + O₂ ↑  

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