The preparation of HI(g)by the reaction of KI(s)with phosphoric acid is not a redox reaction.

Question

Quizplus · Accepted Answer

The preparation of HI(g) by the reaction of KI(s) with phosphoric acid involves the acid-base reaction between phosphoric acid and potassium iodide, wherein the hydrogen ion from the acid protonates the iodide ion to form HI(g) while the phosphate ion acts as a spectator ion. This reaction does not involve any change in oxidation state and hence is not a redox reaction.

The Preparation of HI(g)by the Reaction of KI(s)with Phosphoric Acid