Q52P - Chemistry: Molecular Nature Of Matter And Change

Question

 What is the central idea of collision theory? How does this idea explain the effect of concentration on reaction rate?

Step-by-Step Solution

Answer

The central idea of collision theory is that reactant molecules must collide with each other in order to react. Thus, the total number of collisions per unit of time predicts the rate of a reaction. Further, this theory explains that the reaction rate depends upon the product of the concentrations of the reactants.

Step 1: What is the central idea of collision theory?

Collision theory is a mathematical model for predicting the speeds of chemical reactions, especially in gases. The collision hypothesis assumes that for a reaction to occur, the reacting species (atoms or molecules) must come together or collide with one another.

Step 2: How does this idea explain the effect of concentration on reaction rate?

The core principle of collision theory is that reactant molecules must collide with one another to react. As a result, the pace of response is predicted by the total number of collisions per unit of time. This theory also explains that the product of the reactant concentrations determines the reaction rate.