AQA A Level lesson after RP1: the concentration of the alkali from pupils’ own results, and the direction of an error. Slides, sheets, answers.
Lesson 18 of a 23-lesson sequence on amount of substance. Cycle 1 calculates the concentration from the weighed standard and the titre. Cycle 2 reasons out whether a given error makes the result too high or too low, with the standard in the burette or in the pipette.
Two teaching cycles, each with a worked example, a gap-fill, a hinge question, a completion problem, whiteboards and a timed independent task.
What’s included: a teacher PowerPoint with answers revealed on click and full speaker notes (timings, what to look for, what each wrong answer means); a pupil PowerPoint with the answers removed, ready to print; a worksheet, a support sheet, extra practice and full worked answers as editable Word documents.
Specification: AQA AS and A Level Chemistry 7404/7405, 3.1.2 Amount of substance. Built for 55-minute lessons; suits any board that teaches moles at AS.
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£3.50