What are the factors affecting rate of chemical reaction? - Dr K

Summary

An explanation of collision theory and the four primary factors—concentration, surface area, temperature, and catalysts—that influence the rate of chemical reactions.

Highlights

Introduction to Collision Theory00:00:01

For a chemical reaction to occur, particles must collide with sufficient activation energy and proper orientation. The rate of reaction is directly linked to the frequency of these successful collisions.

Factor 1: Concentration00:01:56

Increasing reactant concentration provides more particles in the same space, increasing the probability of collisions and thus the rate of the reaction.

Factor 2: Surface Area00:02:56

For solids, breaking them into smaller pieces increases the total surface area available for collisions, which directly increases the reaction rate.

Factor 3: Temperature00:04:14

Increasing temperature raises the average kinetic energy of particles, ensuring a higher proportion of them meet the activation energy threshold, leading to more frequent successful collisions.

Factor 4: Catalysts00:05:19

Catalysts accelerate reactions by lowering the required activation energy without being consumed themselves, thereby increasing the rate constant and the overall reaction rate.