pdf, 1 MB
pdf, 1 MB
pdf, 1.65 MB
pdf, 1.65 MB

A complete AQA A-level Chemistry Required Practical 2 worksheet: measure the temperature change of a neutralisation in a polystyrene cup, extrapolate a cooling curve and calculate the enthalpy change, with full mark scheme.

Two separate files

  • Worksheet (9 pages): the student copy, print-ready in black and white
  • Mark scheme (11 pages): the same worksheet completed with every answer written in red, with marks shown, plus teacher and technician notes and marking guidance

Use it during the practical, as a follow-up lesson or as homework. Students who don’t get results can still draw the cooling curve and do every calculation using the full practice data set.

What students do

  • Label the polystyrene cup calorimeter
  • Work out moles, solution mass and the limiting reactant before the practical
  • Follow the method, with a “why?” prompt for each key step
  • Spot which calorimeter set-up is right (insulation and thermometer position)
  • Put the cooling-curve method in order
  • Read three thermometer close-ups to 0.1 °C
  • Record their own timed temperatures in a blank table
  • Draw best-fit lines on a practice graph and extrapolate to the mixing time
  • Calculate the enthalpy change of neutralisation, one step at a time
  • Calculate percentage uncertainties for the thermometer and measuring cylinder
  • Sort 7 changes by their effect on the temperature rise, then explain two
  • Answer 10 exam-style questions (21 marks), including Hess’s law, zinc and copper sulfate, and a 6-mark extended response
  • Finish with an “I can” self-check

For teachers

  • Quantities per group, timings and safety notes
  • Common slips to watch for
  • Which tasks to set before the practical

All questions are original. This is an independent resource, not endorsed by AQA.

Get this resource as part of a bundle and save up to 38%

A bundle is a package of resources grouped together to teach a particular topic, or a series of lessons, in one place.

Bundle

AQA A-level Chemistry All 12 Required Practicals Bundle

All 12 AQA A-level Chemistry (7405) required practicals in one bundle. Every pack has a print-ready student worksheet and a separate mark scheme with every answer written in red. **What's in the bundle** - RP1 Making a standard solution and carrying out a titration - RP2 Measuring an enthalpy change - RP3 Effect of temperature on rate of reaction - RP4 Test-tube tests for cations and anions - RP5 Distillation of a product from a reaction - RP6 Tests for alcohol, aldehyde, alkene and carboxylic acid - RP7 Rate equations: initial rate and continuous monitoring - RP8 Measuring the EMF of an electrochemical cell - RP9 pH curves for weak and strong acids and bases - RP10 Preparing a pure organic solid and a pure organic liquid - RP11 Test-tube reactions of transition metal ions - RP12 Separation of species by thin-layer chromatography **Every pack includes** - 12 tasks, such as labelling apparatus, the method with a "why?" prompt at each step, putting steps in order, spotting set-up faults and what-went-wrong questions - Practice data, so students who miss the lab can still complete the calculations and graphs - A 21-mark exam-style section, including a 6-mark extended response with level descriptors - An "I can" self-check - Teacher and technician notes: quantities per group, timings, CPAC opportunities and a safety note for every reagent - A mark scheme with every answer in red, mark splits, accepted alternatives and common slips **Why this bundle** - Covers every AQA A-level Chemistry required practical, Year 1 and Year 2 - Print-ready in black and white, with no prep needed - £15 for all 12, a saving of £9 on buying them separately All questions are original. This is an independent resource, not endorsed by AQA.

£15.00

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