---
title: "Reversible Reaction — AP Chem Definition & Exam Guide"
description: "A reversible reaction runs forward and backward at the same time, leading to dynamic equilibrium. It powers Units 5, 7, and 9 on the AP Chem exam."
canonical: "https://fiveable.me/ap-chem/key-terms/reversible-reaction"
type: "key-term"
subject: "AP Chemistry"
---

# Reversible Reaction — AP Chem Definition & Exam Guide

## Definition

A reversible reaction is one where the products can react to produce the original reactants.

## Related Study Guides

- [9.5 Free Energy and Equilibrium](/ap-chem/unit-9/free-energy-equilibrium/study-guide/ConxkA0PUZM7vwf8nPNr)

## Review

### Related Terms

- Irreversible Reaction: A chemical reaction where products cannot revert back into reactants.
- [Chemical Equation](/ap-chem/key-terms/chemical-equation): Represents how reactants turn into products during a chemical reaction.
- [Reaction Rate](/ap-chem/key-terms/reaction-rate): The speed at which reactants turn into products.