Summary

• Description:

  The PDF document comprises Kapsabet High School Chemistry Paper 3 2025 Mock Exam with Marking Scheme.

  • Paper: KCSE Chemistry (Practical) Paper 3 (233/3) Post Mock 2025
  • Duration: 2 ¼ Hours
  • 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:

  • Rates of reaction: investigating the effect of temperature on the reaction between oxalic acid and potassium manganate(VII) (timing decolourisation and calculating rate)
  • Graph work: plotting (1/t × 1000) against temperature and interpolating values from the graph
  • Volumetric analysis: standardisation of potassium manganate(VII) using ammonium iron(II) sulphate (titration, average titre, mole calculations, and concentration determination)
  • Qualitative analysis of salts: heating a solid, gas tests with litmus, solubility tests, and reactions with sodium hydroxide, dilute sulphuric(VI) acid, aqueous ammonia, and acidified barium nitrate
  • Further qualitative tests on a second solid: reactions with acidified potassium manganate(VII), sodium carbonate, and ignition observations
• Category:

  Mock Past Papers
• Level:

  Form 4
• Subject:

  CHEMISTRY

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