Use the chemical equation to complete the activity.
Ha(g) + l2 (g) - 2HI(g)
A student makes the following statements:
• Hydrogen always has the same oxidation number, so it has an oxidation number of +1 in both the reactant H and product
HI.
• lodine is in Group VIA, so it has an oxidation number of -1 in both the reactant I and product HI.
• Neither hydrogen nor iodine changes oxidation states, so the reaction is not a redox reaction.
In three to five sentences, describe the mistake that the student made, and determine whether or not the reaction is a redox
reaction. Explain your answer.
(4 points)