Summary

• Description:

  The MS Word document comprises BUNTRA Joint Examination 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 (233/3) Practical examination for May 2025.

  • Duration: 2¼ Hours
  • Total Marks: 40
  • Number of Questions: 3 (Questions 1–3)
  • Instructions: You are not allowed to start working with the apparatus for the first 15 minutes of the time provided.
  • Marking Scheme: The marking scheme is in a different document.

  It covers the following topics:

  • Thermochemistry/calorimetry: temperature change when magnesium reacts with hydrochloric acid and determining molar heat of reaction
  • Volumetric analysis: dilution, titration using phenolphthalein, and mole calculations from titration data
  • Graph work: plotting temperature against time and determining maximum temperature change from the graph
  • Qualitative analysis of an inorganic solid: confirming calcium carbonate using selected reagents and observations
  • Qualitative analysis of an unknown solid: burning test, solubility tests, reaction with sodium hydrogen carbonate, acidified potassium manganate(VII), and bromine water
• Category:

  Mock Past Papers
• Level:

  Form 4
• Subject:

  CHEMISTRY

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