<Dd> 2 HBr + H SO → Br + SO + 2 H O </Dd> <P> The acid may be prepared by: </P> <Ul> <Li> reaction of bromine with water and sulfur: <Dl> <Dd> 2 Br + S + 2 H O → 4 HBr + SO </Dd> </Dl> </Li> <Li> bromination of tetralin: <Dl> <Dd> C H + 4 Br → C H Br + 4 HBr </Dd> </Dl> </Li> <Li> reduction of bromine with phosphorous acid: <Dl> <Dd> Br + H PO + H O → H PO + 2 HBr </Dd> </Dl> </Li> </Ul> <Li> reaction of bromine with water and sulfur: <Dl> <Dd> 2 Br + S + 2 H O → 4 HBr + SO </Dd> </Dl> </Li>

Does hbr form ions in an aqueous solution