A solution containing 0.1 M CH3C1 and 0.1 M KSCN in DMF reacts to give CH3SCN and

Question:

A solution containing 0.1 M CH3C1 and 0.1 M KSCN in DMF reacts to give CH3SCN and KC1 with an initial rate of 2 × 10-8 mol L-1 s-1.
(a) What is the rate constant for this reaction?
(b) Calculate the initial reaction rate for each of the following sets of reactant concentrations:
(i) [CH3C1] = 0.2 M. [KSCN] = 0.1 M.
(ii) [CH, C1] = 0.2 M, [KSCN] = 0.3 M.
(iii) [CH3CI] = 0.4 M. [KSCN] = 0.4 M.