Summary

• Description:

  The MS Word document comprises Mmalina Trial 2 Chemistry Paper 3 2026 Mock Exam with 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 paper evaluates practical laboratory techniques including thermometric solubility determinations, redox titrations, and qualitative analysis of organic and inorganic compounds. It is essential for learners preparing to excel in the KCSE chemistry practical examination.

  • Month Administered: July 2026
  • Duration: 2 Hours 15 Minutes
  • Total Marks: 40
  • Number of Questions: 3 (Questions 1 - 3)
  • Structure: Three compulsory practical questions featuring quantitative analysis (solubility determination and redox titration), inorganic qualitative salt analysis, and organic functional group testing.

  It covers the following topics:

  • Question 1: Quantitative Analysis
    • Solubility determination: Crystallization temperature measurement of a hydrated dibasic acid at varying dilutions and plotting a solubility curve
    • Redox titration: Titration of acidified potassium manganate(VII) against a dibasic acid solution to determine relative formula mass
  • Question 2: Inorganic Qualitative Analysis
    • Systematic testing of a two-salt mixture involving precipitation, flame testing, and reactions with aqueous ammonia, barium nitrate, and acidified potassium manganate(VII)
    • Confirmatory tests for sulphite and zinc ions
  • Question 3: Organic Qualitative Analysis
    • Ignition/combustion test for degree of unsaturation
    • Solubility, tests for unsaturation using bromine water, carboxylic acid testing with sodium hydrogen carbonate, and redox tests with acidified potassium dichromate(VI)
• File Size:

  358.34 KB
• Category:

  Mock Past Papers
• Level:

  Form 4
• Subject:

  Chemistry
• Posted By:

  Caleb_Peter

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