IGCSE›Cambridge IGCSE Chemistry›Mind mapsAcid-Base TitrationsCambridge IGCSE Chemistry: Mind mapStudy pack PDFAlso for this subtopic:Revision notesFlashcardsSubtopic testCover factsApparatusBurette adds a variable volume slowlyVolumetric pipette measures one fixed volumeIndicator shows the end-pointSolution from the pipette goes in a conical flaskMethod1. Pipette a fixed volume of alkali into the flask2. Add a few drops of indicator3. Fill the burette with the acid4. Add acid slowly, swirling, until the colour changes5. Record the volume usedTitrationacid-basepipetteburetteEnd-pointShown by the indicator colour changeSignals neutralisation has just occurredPhenolphthalein: pink to colourless as acid is added to alkaliWhy these tools?Burette gives precise, variable volumesPipette is precise but cannot be adjustedIndicators are cheap but hard to judge in coloured solutionsExam tipsRough titration first, then repeat carefullyGo drop by drop near the end-pointBurette = variable; pipette = fixed