Suppose you need highly pure HI. You could prepare it by reacting hydrogen and iodine directly by

Question:

Suppose you need highly pure HI. You could prepare it by reacting hydrogen and iodine directly by the reaction H₂(g) + I₂(g) → 2 HI(g), provided that the reaction is sufficiently fast. You might conduct an experiment to study the reaction rate to check if the preparation of HI in this process is fast enough. In an interval of 100. s, the concentration of HI increased from 3.50 mmol · L^–1 to 4.00 mmol · L^–1. What was the average rate of this reaction?

PLAN Substitute the data into Eq. 1b. Average rate of formation of P = A[P] At (1b)