A teacher asks a student to design an investigation using the reaction of chlorine with potassium iodide to create iodine and potassium chloride. The student starts
with an aqueous solution of chloride of unknown molarity and dissolves two grams of potassium chloride into the solution to begin the reaction. The iodine falls out of
solution as a solid precipitate. The equation for this reaction is shown.
Cl₂ +2KI → 1₂+2KC1
Assuming the reaction completes, what measurement could the student use to determine the limiting reactant?
O
A the change in molarity after adding the Kl
с
the weight of l2 at the end of the reaction
the heat generated by adding the KI
D the time it takes the l2 precipitate to form