Chemistry · Group 13 to Group 18 Elements
Concentrated cannot be used to prepare HBr or HI from KBr or KI because it
Concentrated \( \boldsymbol{H}_{2} \boldsymbol{S} \boldsymbol{O}_{4} \) cannot be used to prepare HBr or HI from KBr or KI because it
- A. reacts too slowly with KBr or KI
- B. reduces HBr or H
- C. oxidises KBror KI
- D. oxidises KBr to \( K B r O_{3} \) or \( K \) I to \( K I O_{3} \)
Step-by-step solution
Concentrated H2SO4 is a strong oxidizing agent. It oxidizes Br⁻ to Br₂ and I⁻ to I₂, preventing the formation of HBr or HI. Instead, the halogens are produced as gases (Br₂, I₂) along with SO₂ and water.
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