Question

Br2->HBr->KBr->Br2->NaBr->NaCl

Answer 1

1) Br 2 + H2=  2HBr 
2) HBr + KOH = KBr + H2O 
3) KBr + K2MnO4 = Br2 + MnBr2 + KBr + H2O
4) Br2 + 2NaCl = 2NaBr + Cl2 
 5) NaBr + HCl = NaCl + HBr 

Answer 2

Reaction Sequence: Br2 -> HBr -> KBr -> Br2 -> NaBr -> NaCl

The given reaction sequence involves the transformation of bromine (Br2) through several steps, resulting in the formation of sodium chloride (NaCl). Let's break down each step:

1. Br2 -> HBr: The first step involves the reaction of bromine (Br2) with hydrogen gas (H2) to form hydrogen bromide (HBr). This reaction is an example of a halogenation reaction, where a halogen reacts with a hydrogen-containing compound. The reaction can be represented as follows: ``` Br2 + H2 -> 2HBr ``` 2. HBr -> KBr: In the second step, hydrogen bromide (HBr) reacts with potassium metal (K) to form potassium bromide (KBr). This is a single-displacement reaction, where a more reactive metal displaces a less reactive metal from its compound. The reaction can be represented as follows: ``` HBr + K -> KBr + H2 ``` 3. KBr -> Br2: The third step involves the reaction of potassium bromide (KBr) with chlorine gas (Cl2) to regenerate bromine (Br2). This is a redox reaction, where bromide ions (Br-) are oxidized to bromine (Br2) while chlorine (Cl2) is reduced to chloride ions (Cl-). The reaction can be represented as follows: ``` 2KBr + Cl2 -> 2KCl + Br2 ``` 4. Br2 -> NaBr: In the fourth step, bromine (Br2) reacts with sodium metal (Na) to form sodium bromide (NaBr). This is another example of a single-displacement reaction, similar to the second step. The reaction can be represented as follows: ``` Br2 + 2Na -> 2NaBr ``` 5. NaBr -> NaCl: The final step involves the reaction of sodium bromide (NaBr) with chlorine gas (Cl2) to form sodium chloride (NaCl). This is a redox reaction, similar to the third step. The reaction can be represented as follows: ``` NaBr + Cl2 -> NaCl + Br2 ``` It's important to note that the given reaction sequence is not a complete chemical equation, as it doesn't include the necessary reactants and products for each step. The reactions mentioned above are simplified representations of the overall transformations.

I hope this explanation helps! Let me know if you have any further questions.