HALOGENATION OF PROPANONE

Hint

For an elementary reaction of the form, aA + bB → cC

Note: Only the reactant concentrations appear in the rate expression (i.e., A and B for the reaction given above).

Elementary or Composite?

If the reaction

P_k + I₂ → PI + H⁺ + I^-

-d[I₂]/dt = -k[PI][H⁺][I^-]

-d[I₂]/dt = +k[PI][H⁺][I^-]

-d[I₂]/dt = -k[P_k][I₂]

-d[I₂]/dt = +k[P_k][I₂]