Practice Problem 1
Use the data in the above table to calculate the rate at which phenolphthalein reacts with the OH- ion during each of the following periods:
(a) During the first time interval, when the phenolphthalein concentration falls from 0.0050 M to 0.0045 M.
(b) During the second interval, when the concentration falls from 0.0045 M to 0.0040 M.
(c) During the third interval, when the concentration falls from 0.0040 M to 0.0035 M.
(a) 4.8 x 10-5 M/s
(b) 4.2 x 10-5 M/s
(c) 3.7 x 10-5 M/s