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🧪 How to Read Titration Curves

Read axes, locate equivalence, distinguish endpoint from chemistry, and use titration data to estimate concentration and pKa.

3
lessons
~20 min
to learn
🔬 Science
subject
Adults
level
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What you’ll learn

  1. Read and locateRead the axes and locate an evidence-based equivalence estimate.A titration curve relates added titrant to pH; its inflection region often provides a practical equivalence estimate.
  2. Interpret the chemistryDistinguish endpoint, equivalence, concentration, pKa, and acid-strength patterns.Stoichiometry and equilibrium explain what the curve means, including why equivalence pH is not always 7.
  3. Use the curve wellChoose indicators, handle measured data, check estimates, and report limits.Good curve reading combines indicator selection, derivative checks, repeated measurements, and honest uncertainty.

Questions this course answers

What does the equivalence point represent?

Equivalence is defined by reaction stoichiometry, while a color change is an endpoint signal.

Where is equivalence usually read on a clear curve?

The inflection region of the steep rise often estimates the equivalence volume.

What is true at half-equivalence for a weak acid?

Equal acid and conjugate-base amounts make the logarithmic term zero.

How should an indicator be selected?

A transition inside the rapid pH change keeps endpoint volume close to equivalence volume.

What does the horizontal axis usually show?

A titration curve plots solution pH against the amount or volume of titrant delivered.

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