Question

Under a different set of conditions, the initial concentration of Br^- is 0.00 M. 20 seconds later it is 0.20 M. What is the rate of change of Br^- in M/s?

Answer 1

Solution :-

initial concnetration is 0.00 M and final concentration is 0.20 M

time initial is 0.00 sec and final time is 20. sec

rate = ?

Formula to calculate the rate is as follows.

Rate is nothing but ratio of the change in concentration over the change in time.

Rate = delta [Br^-]/ Delta T

         = [0.20 M-0.00 M] / [20 sec -0.00 sec]

        = 0.01 M/s

Therefore the rate of the change of the Br^- is 0.01 M/s