What you’ll learn6 learning objectivesChoose one objective for a focused lesson, or study the complete topic.P5.1Defining the experimental problemIdentify a safe and efficient procedure, steps, suitable apparatus, risks, independent variable, dependent variable, controlled variables, aim and prediction in words or as a predicted graph.Syllabus objectiveP5.2Planning methods and apparatusDescribe the full method, apparatus arrangement, labelled diagrams, measuring instruments, volumes, concentrations, risk precautions, variation of independent variable, measurement of dependent variable, controls, result tables and how data will be used to reach a conclusion.Syllabus objectiveP5.3Standard laboratory practice in plansUse standard quantitative practice such as making standard solutions, weighing by difference, achieving titration concordancy, heating to constant mass and taking extra readings near an inflection point.Syllabus objectiveP5.4Dealing with dataIdentify calculations and presentation needed to draw conclusions; calculate mean, percentage, percentage gain or loss, percentage error and quantities from raw data; plot graphs, find y = mx + c values, choose axes and use correct significant figures.Syllabus objectiveP5.5Conclusions from experimental evidenceDraw conclusions with detailed key features of data and analysis; judge whether data support the conclusion or prediction; give scientific explanations; make further predictions and suggest improvements.Syllabus objectiveP5.6Evaluation, reliability, validity and confidenceIdentify anomalies and possible explanations; judge replication, data range, variable control and method weaknesses; explain effects of concentration or condition changes and apparatus misuse; judge reliability, trustworthiness, quality of data, validity and confidence in conclusions.Syllabus objective
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