first order reaction

Question

CH₃OH+KF→KOH+CH₃F is a first order reaction for all of the reactants, with a rate constant of 0.0123 1/Ms. Find the instantaneous rate for this reaction if the initial concentration of CH₃ Oh is 0.59 M, and the initial concentration of KF is 1.22 M.

Answer 1

For CH3OH+KF→KOH+CH3F, being 1st order in both reactants, the rate law can be written as 

rate = k [CH3OH][KF] =0.0123 M^-1s^-1

rate = (0.0123)(0.59)(1.22) = 0.00885 Ms^-1