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Why hydrogen bromide cannot be prepared ...

Why hydrogen bromide cannot be prepared by reacting sodium bromide with concentrated `H_2 SO_4`?

Text Solution

Verified by Experts

It is because the HBr formed in the reaction is a reducing agent and reduces `H_(2)SO_(4)` or `SO_(2)`. The reaction is as follows:
`[NaBr+H_(2)SO_(4)toNaHSO_(4)+HBR]xx2`
`H_(2)SO_(4)+2HBrto2H_(2)O+SO_(2)+Br_(2)`
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