Question

Реакция ионного обмена с выделением газа протекает между растворами 1)гидроксида бария и сульфата цинка2)сульфида натрия и серной кислоты3)нитрата серебра и хлорида натрия4)гидроксида натрия и серной кислоты

Answer 1

Конечно же 2 так выделяется сероводород 

Answer 2

Reaction of Ion Exchange with Gas Evolution

1) Reaction between Barium Hydroxide and Zinc Sulfate: - When barium hydroxide reacts with zinc sulfate, it forms barium sulfate and zinc hydroxide. This reaction does not involve the evolution of gas.

2) Reaction between Sodium Sulfide and Sulfuric Acid: - The reaction between sodium sulfide and sulfuric acid results in the formation of sodium bisulfide and water. This reaction does not involve the evolution of gas.

3) Reaction between Silver Nitrate and Sodium Chloride: - When silver nitrate reacts with sodium chloride, it forms silver chloride and sodium nitrate. This reaction does not involve the evolution of gas.

4) Reaction between Sodium Hydroxide and Sulfuric Acid: - The reaction between sodium hydroxide and sulfuric acid produces sodium sulfate and water. This reaction does not involve the evolution of gas.

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