CH 14 IMI ± pH and Kinetics Bywhat tactor wilthe rate ofthe reaction dange the p
ID: 1086789 • Letter: C
Question
CH 14 IMI ± pH and Kinetics Bywhat tactor wilthe rate ofthe reaction dange the pH doreases from 5 50 to 200? Express your answer numerically using two significant figures. according to the following net ionic equation View Available Hint(s) io,-(aq) + 3SO_ (aq) (aq) + 3so,,-(aq) Hint 1. How to approach the problem According to the rate law, the reaction rate is directy proportional to the H concentration rate IO, so,H rate [H+] In other words, the rate changes by the same factor as [H H'1 nitial rate inlial H' fnal rate Use pHI to calculate the hydrogen ion then find the ratio. to apen) Hint 3. Determine the final hydrogen ion concentration (lick to open)Explanation / Answer
Intial pH = 5.50 , pH = - log [H+]
[H+] = 10-pH, So intial [H+] = 10-5.5 = 3.16 x 10-6 M
Final pH = 2.00, [H+] = 10-2.0 = 0.01 M
Final [H+] / Intial [H+] = 0.01 M / 3.16 x 10-6 M
Final [H+] / Intial [H+] = 3.16 x 103