Final answer:
The molecularity of the reaction NH2Cl(aq) + OH-(aq) → NHCl-(aq) + H2O(l) is bi-molecular because two reactant species are involved in the elementary step of the reaction.
Step-by-step explanation:
The molecularity of an elementary reaction refers to the number of reactant particles involved in a single event leading to a chemical transformation. For the elementary reaction given, NH2Cl(aq) + OH-(aq) → NHCl-(aq) + H2O(l), the molecularity is determined by the number of reactant species that come together to react in a single step. In this case, one NH2Cl molecule and one OH- ion come together to react, making the molecularity of the reaction bi-molecular, as there are two reactant species involved in the rate-determining step.
In the given elementary reaction, the reaction involves two reactant species, NH2Cl(aq) and OH-(aq), and produces two product species, NHCl-(aq) and H2O(l). Therefore, the molecularity of this reaction is bimolecular.