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Chlorine (Cl₂) and bromine (Br₂) are both halogens, and they react with each other in a displacement reaction. This means that the more reactive halogen (chlorine in this case) displaces the less reactive halogen (bromine) from its compound. A video visualizing this reaction would show the following:
1. Initial state: Chlorine gas (pale green) and bromine liquid (reddish-brown) are separately contained in beakers.
2. Mixing: The chlorine gas is bubbled through the bromine liquid.
3. Reaction: Chlorine atoms displace bromine atoms from bromine molecules, forming chlorine bromide (ClBr) which is a reddish-brown gas, and elemental bromine (Br₂) is released as a vapor.
4. Final state: The solution turns orange due to the presence of both chlorine bromide and bromine vapor.