This definitions covers Key Definitions within Titrations (HT) for GCSE Chemistry. Revise Titrations (HT) in Quantitative Chemistry for GCSE Chemistry with 22 exam-style questions and 20 flashcards. This topic shows up very often in GCSE exams, so students should be able to explain it clearly, not just recognise the term. It is section 8 of 14 in this topic. Make sure you can use the exact wording confidently, because definition marks are often lost through vague language.
📖 Key Definitions
Titre: The volume of solution added from the burette in a single titration run (final burette reading minus initial burette reading), measured in cm³.
Concordant results: Titration repeats that agree within 0.10 cm³ of each other. Only concordant results are averaged — anomalous results are discarded.
Endpoint (equivalence point): The precise point in a titration where the acid and alkali have completely neutralised each other. The indicator changes colour permanently at this point.
Indicator: A substance that changes colour depending on whether the solution is acidic or alkaline. Used in titrations to signal the endpoint.
Meniscus: The curved surface of a liquid in a tube. Always read the bottom of the meniscus in a burette, at eye level, to avoid parallax error.
Practice questions for Titrations (HT)
What is the purpose of a titration?
Explain why the burette should be rinsed with the acid solution before filling it for a titration.