Answer to Question #132487 in Organic Chemistry for Aida

Question

What are the unit of the rate constant for a 1/2-order reaction? express all concentrations in molarity and time in seconds.

Answer 1

Rate = -dC_A/dt = KC_Aⁿ

mole L^-1 sec^-1 = K(mole L^-1) ⁿ

n= order of reaction

unit of K= mol^1-n L^n-1 sec^-1

For ½ order reaction n=1/2

Unit of K = mol^1/2 L^-1/2 sec^-1 [molarity(M)= mol/L]

               =M^1/2 sec^-1(Answer)