To identify oxidizing and reducing agents in the given oxidation-reduction reaction (acidic solution):
Cr2O72–(aq) + I–(aq)→ Cr3+ (aq)+ IO3–(aq)
To do so, we need to identify the change in oxidation state for each element in the reaction.
Recall the mnemonic for redox reactions:
Loss Electrons →Oxidation →Reducing Agent
Gain Electrons →Reduction →Oxidizing Agent
This means the element that gains electrons/reduced is the oxidizing agent while the element that loses electrons/oxidized is the reducing agent.
Identify the oxidizing and reducing agents.
Cr2O2−7(aq)+I−(aq)→Cr3+(aq)+IO−3(aq) (acidic solution)
Express your answers as chemical expressions separated by a comma.