Titration questions turn up in every IGCSE Chemistry practical paper. Run the burette yourself and stop at the colour change, then practise reading the meniscus, completing the results table, choosing indicators and working out concentrations. Fresh numbers every time, with worked solutions.
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Initial and final readings read at the bottom of the meniscus, at eye level, and recorded to at least the nearest 0.1 cm³.
Each titre is final minus initial. The rough titration is left out of the mean.
Use accurate titres that agree closely (within about 0.2 cm³) to calculate the mean.
A clear statement of the colour change, for example methyl orange from yellow to orange.
Moles = concentration × volume in dm³, then the mole ratio from the equation, then the unknown concentration.
The marking follows the conventions in published Cambridge mark schemes. The experiments, readings and wording on this page are our own.