Ch ChemAI

All experiments › Acids, bases and salts

pH titration curve

Add acid from a burette and draw the S-shaped curve.

Topic: Acids, bases and saltsGrade: 11Free

🧪 Start the experiment — free

Runs in the browser on phones, tablets and computers. No sign-up needed. For teachers: assign any experiment to a class, see results and calculations.

What you do

  1. Turn on the pH meter. Open the data logger, choose pH and tick “x = acid added”.
  2. Open the burette tap and let 15 mL of hydrochloric acid run in (×5 makes it faster).
  3. Near the end point turn the tap to drop by drop, up to 25 mL.
  4. Read the equivalence point from the steep part of the graph (about 20 mL).
  5. From the graph: at what volume of HCl is the equivalence point (mL)?

More experiments on this topic

Neutralisation with an indicatorTurn a pink base colourless by adding acid, and watch the temperature rise.Red-cabbage rainbowA natural indicator shows a different colour at every pH.Strong and weak acidsSame concentration, very different behaviour.Making a salt: copper sulfateBase + acid → salt + water, with copper(II) oxide.The hydrogen balloonCollect the gas from a metal and an acid in a balloon — then light it.Making a salt: copper(II) sulfate crystalsReact an insoluble base with an acid, filter off the excess and crystallise the salt.