Titration curve simulator

Add alkali to an acid and read the pH at any point. Compare strong and weak acids and bases, find the equivalence point and the pH at half-equivalence, and see which indicators work.

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Questions students ask

Why is the equivalence point above 7 for a weak acid and strong base?

The salt formed contains the weak acid's conjugate base, which reacts with water to make OH⁻ ions.

Which indicator should I use?

One whose colour change happens within the steep part of the curve: phenolphthalein for a weak acid with a strong base, methyl orange for a strong acid with a weak base.

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