---
title: "Strong Base — AP Chem Definition & Exam Guide"
description: "A strong base dissociates 100% in water, releasing OH⁻ ions. Learn how AP Chem tests strong bases in pH calculations, titrations, buffers, and net ionic equations."
canonical: "https://fiveable.me/ap-chem/key-terms/strong-base"
type: "key-term"
subject: "AP Chemistry"
---

# Strong Base — AP Chem Definition & Exam Guide

## Definition

A strong base is a substance that can completely dissociate in water, producing hydroxide ions (OH-) and the corresponding cations.

## Related Study Guides

- [8.8 Properties of Buffers](/ap-chem/unit-8/properties-buffers/study-guide/PlRbvlggdbKMOXSUWfmD)

## Review

### Related Terms

- [Base](/ap-chem/key-terms/base): A substance that can accept protons or donate a pair of valence electrons.
- Alkali: A type of base that dissolves in water to form hydroxide ions.
- [Dissociation](/ap-chem/key-terms/dissociation): The process where compounds split into smaller particles such as atoms, ions, or radicals, usually in a reversible manner.