Practical chemistry questions

M Measurements & apparatusChoose suitable apparatus, record measurements correctly and practise the measurement decisions behind reliable practical data. apparatus choicerecording datameasurement languagestandard solutions Practise → T Titration techniqueRinsing, burette setup, pipette delivery, endpoints, concordant titres and the effect of practical mistakes. rinsingburette setupendpointconcordance Practise → ± Percentage uncertaintyCalculate percentage uncertainty, handle differences between two readings and choose improvements that address the actual limitation. percentage uncertaintytwo readingsdominant uncertaintytargeted improvements Practise → G Graphs & dataChoose axes and scales, plot data, recognise anomalies, judge best fit, interpolate and use tangents and gradients. axes and scalesplottingbest fitanomaliesgradients Practise → R Rates experimentsChoose how to follow a reaction, plan initial-rate work and extract rates from experimental data. monitoring methodsinitial ratescolorimetrytangents Practise → ΔT CalorimetryChoose the measurements you need, correct temperature changes from graphs and judge heat-loss and uncertainty improvements. temperature changeheat losscooling correctionuncertainty Practise → Q Qualitative analysisChoose reagents, use observations to identify ions and design test sequences that avoid misleading results. reagentsobservationsion teststest sequence Practise → P Plan & evaluateChoose variables, diagnose weak methods and match an improvement to the experimental problem it actually fixes. variablesmethod designevaluationtargeted improvements Practise → Org Organic methodsReflux, distillation, functional-group tests, separating funnels, drying, recrystallisation, filtration and purity checks. refluxdistillationpurificationrecrystallisation Practise → E Electrochemical cellsChoose half-cell components, explain the salt bridge and apply standard conditions to cell-potential measurements. half-cellssalt bridgevoltmeterstandard conditions Practise → Redox Redox titrationsPractise manganate(VII) and iodine–thiosulfate end points, reagent choices and accurate redox-titration technique. manganate(VII)iodine–thiosulfateend pointstitration technique Practise → pH pH measurementsCalibrate a pH meter, collect a useful titration dataset and improve measurements near the end point. pH calibrationprobe techniquepH curvesmeasurement intervals Practise → TLC TLCSet up TLC correctly, calculate Rf values and use chromatograms to identify compounds or follow a reaction. TLC setupRf valuesidentificationreaction monitoring Practise → ? Unfamiliar practicalsTransfer familiar practical skills into experiments you may not have seen before, then decide what to measure, control or change. transfermethod judgementplanningevaluation Practise → Plan Investigation builderBuild an investigation one decision at a time: variable, measurement, apparatus, controls, repeats and data processing. experimental designvariablesapparatusdata processing Practise → Adv Advanced practical challengeWork through eight Year 13 questions that mix method design, data handling, uncertainty, evidence and unfamiliar experimental contexts. synoptic planningdata evaluationmethod transferharder practical reasoning Practise → Mix Mixed practical skillsMove between measurements, titration, uncertainty, graphs, rates, calorimetry, qualitative analysis, organic methods, cells, pH, TLC and planning. mixed retrievalmethod judgementdata handlingexam technique Practise →