Answer to Question #56214 in General Chemistry for Tracy Guido

Question

What statements regarding the displacement (redox reactions) of halogens ions are true?

Chlorine will displace Br- ions from solution but not displace I - ions from solution

Addition of bromine to a solution containing chloride ions will result in the formation of chlorine gas

Iodine will be formed when bromine is added to a solution containing iodide ions

Chlorine will displace both bromide and iodide ions from solution

Iodine will displace both chloride and bromide ions from solution

Answer 1

Iodine will be formed when bromine is added to a solution containing iodide ions:
Br₂ + 2I^– → I₂ + 2Br^–

Chlorine will displace both bromide and iodide ions from solution:
Cl₂ + 2Br^– → Br₂ + 2Cl^–
Cl₂ + 2I^– → I₂ + 2Cl^–