Summary

• Description:

  The PDF document comprises ACK Joint Examination Chemistry Paper 3 2026 Pre-Mock Exam with Marking Scheme. The marking scheme is in a different document.

  It was an ACK Joint Evaluation Chemistry Paper 3 practical examination evaluating students' quantitative and qualitative analysis competencies, including solubility determination, titration calculations, and organic/inorganic ion identification. This practical test paper serves as an excellent revision tool for KCSE candidates aiming to enhance their laboratory skills and exam preparation.

  • Month Administered: July 2026
  • Total Marks: 40 Marks
  • Number of Questions: 3 Questions
  • Structure: Question 1 (22 marks), Question 2 (12 marks), Question 3 (6 marks)

  It covers the following topics:

  • Question 1 (22 Marks)
    • Procedure I: Determination of solubility of ethane-1,2-dioic acid (solid P) at various temperatures and plotting a solubility curve
    • Procedure II: Volumetric analysis / acid-base titration of dibasic acid solution R against 0.2 M sodium hydroxide (solution Q) to determine formula mass and water of crystallization
  • Question 2 (12 Marks)
    • Qualitative analysis of solid T (mixture of two compounds): cation and anion testing using NaOH, aqueous ammonia, nitric (V) acid, and hydrochloric acid
  • Question 3 (6 Marks)
    • Qualitative analysis of organic liquid W: flammability test, sodium hydrogen carbonate reaction for carboxylic group testing, and oxidation using acidified potassium dichromate (VI)
• File Size:

  75.36 KB
• Length:

  7 pages
• Category:

  Mock Past Papers
• Level:

  Form 4
• Subject:

  CHEMISTRY
• Posted By:

  Caleb_Peter

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