Question #90cea Chemistry Chemical Reactions Chemical Reactions and Equations 1 Answer Oscar L. Mar 2, 2016 Oxygen from the air oxidized (some of) the iodide ions back to iodine. Explanation: #4I^{-} + O_{2} + 2H_{2}O -> 2I_{2} + 4OH^{-}# Answer link Related questions Question #fee47 Question #c5c15 Question #19eb9 Question #e2ea2 Question #bc751 Question #e2ea6 Question #08b07 What is the thermochemical equation for the combustion of benzene? Why are chemical reactions reversible? Why are chemical reactions important? See all questions in Chemical Reactions and Equations Impact of this question 1268 views around the world You can reuse this answer Creative Commons License