In the Merck's process for the laboratory preparation of Hydrogen Peroxide (), dilute Sulphuric Acid is reacted with Barium Peroxide. Why is it absolutely critical to use hydrated Barium Peroxide () r

Question

In the Merck's process for the laboratory preparation of Hydrogen Peroxide ($H_2O_2$), dilute Sulphuric Acid is reacted with Barium Peroxide. Why is it absolutely critical to use hydrated Barium Peroxide ($BaO_2 \cdot 8H_2O$) rather than the anhydrous form ($BaO_2$)?

Prashant Kotian · Accepted Answer

Correct answer: C. During the reaction, insoluble Barium Sulphate () is precipitated. If anhydrous is used, this precipitate forms a rigid, impermeable crust over the solid, preventing further acid attack and stopping the reaction. Hydrated prevents this passivation layer from adhering tightly.

💡 Solution & Explanation

Practice 22,000+ questions like this