Summary

• Description:

  The MS Word document comprises AIC CHAMPION JOINT Chemistry Paper 3 2026 Mock Exam with Answers (Marking Scheme). The PDF version is also available upon your request. The marking scheme is in a different document.

  It was a KCSE Chemistry 233/3 examination.

  This practical examination tests candidates' competencies in thermochemistry, volumetric back-titration analysis, and qualitative identification of organic and inorganic compounds.

  • Month Administered: July 2026
  • Duration: 2 ¼ Hours
  • Total Marks: 40
  • Number of Questions: 3 (Questions 1–3)
  • Structure: 3 compulsory practical questions: Question 1 (20 marks), Question 2 (12 marks), and Question 3 (8 marks).

  It covers the following topics:

  • Thermochemistry: determining enthalpy of reaction between magnesium metal and hydrochloric acid using thermometric time-temperature plots
  • Volumetric analysis: back titration of residual hydrochloric acid against standardized sodium carbonate solution using methyl orange
  • Inorganic qualitative analysis: sequential ionic identification using aqueous ammonia, sodium hydroxide, dilute HCl, lead(II) nitrate, and barium nitrate
  • Organic qualitative analysis: flame tests for sootiness/saturation, aqueous solubility, unsaturation testing with acidified potassium manganate(VII), and pH testing
• File Size:

  31.32 KB
• Length:

  7 pages
• Category:

  Mock Past Papers
• Level:

  Form 4
• Subject:

  Chemistry
• Posted By:

  Caleb_Peter

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