Written by the Fiveable Content Team โข Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 examโขWritten by the Fiveable Content Team โข Last updated September 2025
Definition
In chemistry, intermediates are molecules that exist within the course of a reaction, but are neither reactants nor products. Essentially, they are temporary substances formed during a chemical reaction.
This is an unstable state of a system in which old bonds are partially broken and new ones are partially formed. It's like being halfway out the door when leaving your house - not fully inside anymore, but not completely outside either.
A substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change. Like a good coach who helps players perform better without actually playing in the game themselves.
The step-by-step sequence of reactions by which the overall chemical change occurs. It's like following directions on Google Maps - each turn represents one step in getting to your final destination.