# Acid–Base Titration Curve Tutor

Plot an acid–base titration curve, mark buffer and equivalence landmarks, and explain the Henderson–Hasselbalch steps.

> Canonical page: https://elysiatools.com/en/tools/acid-base-titration-curve-tutor

- **Category:** Science & Education

- **Keywords:** titration curve, acid base, pH, equivalence point, Henderson Hasselbalch

## Overview

This teaching model supports monoprotic strong or weak acids/bases with the opposite strong titrant. It uses stoichiometric excess before/after equivalence, Henderson–Hasselbalch in the weak-species buffer region, and conjugate hydrolysis at a weak-species equivalence point. Values assume 25 °C (pKw = 14) and are intended for learning, not laboratory control.

## Inputs

- **Analyte** (select)
- **Analyte concentration (M)** (number)
- **Analyte volume (mL)** (number)
- **Titrant concentration (M)** (number)
- **pKa (weak acid)** (number)
- **pKb (weak base)** (number)
- **Maximum equivalents** (number)
- **Curve samples** (number)

## When to use

- Compare strong acid–strong base and weak acid–strong base titration curves.
- Study buffer regions, half-equivalence behavior, and equivalence points.
- Explore how analyte concentration, volume, titrant concentration, pKa, and pKb affect the curve.

## How it works

- Choose the analyte type: strong acid, weak acid, strong base, or weak base.
- Enter the analyte concentration and volume, titrant concentration, and any required pKa or pKb value.
- Set the maximum equivalents and number of curve samples.
- The tutor generates an HTML titration curve with buffer and equivalence landmarks and calculation explanations.

## Use cases

- Chemistry students reviewing pH changes before, at, and after equivalence.
- Teachers creating visual examples of buffer regions and equivalence points.
- Learners comparing weak and strong analytes under consistent concentration and volume settings.

## Frequently asked questions

### What acid–base systems does the tutor support?

It supports monoprotic strong or weak acids and bases with the opposite strong titrant.

### What inputs are required?

Analyte concentration, analyte volume, and titrant concentration are required. The analyte type and weak-species constants can also be selected or entered.

### What does the output include?

The HTML output includes a plotted titration curve, buffer and equivalence landmarks, and explanatory calculation steps.

### When is Henderson–Hasselbalch used?

It is used in the weak-species buffer region of a titration.

### Are the results intended for laboratory control?

No. Values assume 25 °C with pKw = 14 and are intended for learning.

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