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Science & Education

Acid–Base Titration Curve Tutor

· Last updated：2026-08-03

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

Details

What this tool helps you do

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.

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Written by the Elysia Tools team

Tool usage guide

Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Category
Science & Education
Input types
select, number
Output type
html
Sample coverage
4
API ready
Yes

Overview

Acid–Base Titration Curve Tutor plots pH against titrant addition for monoprotic strong or weak acids and bases with the opposite strong titrant. It marks buffer and equivalence landmarks and explains the relevant Henderson–Hasselbalch steps for learning.

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

  1. 1Choose the analyte type: strong acid, weak acid, strong base, or weak base.
  2. 2Enter the analyte concentration and volume, titrant concentration, and any required pKa or pKb value.
  3. 3Set the maximum equivalents and number of curve samples.
  4. 4The 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.

Examples

1. Acetic acid with sodium hydroxide

Chemistry student

Background

A student wants to study the buffer plateau and basic equivalence point for a 0.1 M weak acid.

Problem

Visualize how pH changes as an equal-concentration strong base is added.

How to use

Choose Weak acid + strong base, enter 0.1 M analyte concentration, 25 mL analyte volume, 0.1 M titrant concentration, and pKa 4.76.

Set maximum equivalents to 2 and curve samples to 81.

Outcome

The HTML result shows the weak-acid titration curve with buffer and equivalence landmarks and explains the Henderson–Hasselbalch calculation.

2. Strong acid and strong base reference curve

Chemistry teacher

Background

A teacher needs a reference curve to compare with weak-acid titration behavior.

Problem

Show the sharp pH change around a neutral equivalence point.

How to use

Choose Strong acid + strong base, enter 0.1 M analyte and titrant concentrations, and use a 25 mL analyte volume.

FAQ

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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Set maximum equivalents to 2 and curve samples to 81.

Outcome

The tutor generates an HTML reference curve centered on the classic strong acid–strong base equivalence behavior.