Summary

• Description:

  The MS Word document comprises Nakuru North Joint Evaluation Chemistry Paper 3 2025 Mock Exam with Marking Scheme. The PDF version is also available upon your request. The marking scheme is in a different document.

  It is a KCSE Chemistry Paper 3 (Practical) (233/3) Nakuru North Joint Evaluation Mock 2025 examination (July/August 2025).

  • Duration: 2¼ Hours (including 15 minutes reading time)
  • Total Marks: 40
  • Number of Questions: 3 (Questions 1–3)
  • Marking Scheme: The marking scheme is in a different document.

  It covers the following topics:

  • Volumetric analysis: preparation of a saturated solution, dilution, standardisation using sodium carbonate, and solubility determination of a dibasic acid
  • Acid–base reactions: ionic equation writing and mole/molarity calculations from titration data
  • Thermochemistry (calorimetry): determining basicity of a strong acid and calculating molar heat of neutralisation of sodium hydroxide using temperature change data and graph work
  • Graph skills: plotting ∆T against volume and using the graph to determine equivalence/maximum temperature change
  • Qualitative analysis of an unknown salt (solid K): tests using sodium hydroxide, aqueous ammonia, sodium sulphate, aluminium foil + warming, and identification of gases using litmus papers
  • Qualitative tests on an unknown solid (solid J): ignition test, pH testing, reaction with magnesium, and redox tests using acidified potassium dichromate(VI) and potassium manganate(VII)
• Category:

  Mock Past Papers
• Level:

  Form 4
• Subject:

  CHEMISTRY

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