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Bromine is extracted from brine wells. The process involves treating water containing bromine ion with chlorine gas and extracting the Br2 from the solution using an organic solvent. Write a net ionic balanced equation for the reaction of chlorine gas with bromide ion (Br-).
1. 2Cl2 (aq) + 2Br- (aq) => 4Cl- (aq) + Br2(aq)
2. Cl2 (aq) + 2Br- (aq) => 2Cl- (aq) + Br2(aq)
3. Cl2 (aq) + 4Br- (aq) => Cl- (aq) + Br2(aq)
4. 2Cl2 (aq) + 2Br- (aq) => 2Cl- (aq) + 2Br2(aq)
5. 4Cl2 (aq) + 2Br- (aq) => 2Cl- (aq) + 4Br2(aq)
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