Summary

• Description:

  The MS Word document comprises Form 3 Chemistry Paper 3 End Term 3 2026 Exam with Marking Scheme. The PDF version is also available upon your request. The marking scheme is in a different document.

  This practical examination tests rigorous quantitative volumetric titration and systematic qualitative salt analysis techniques. It is ideal for end-of-year school-based national assessment preparation towards the end of the term, and can also be effectively administered as a mid-term assessment for schools that have completed the syllabus early at the beginning of the term.

  • Duration: 1 Hour 15 Minutes
  • Total Marks: 30 Marks
  • Number of Questions: 2 Questions (1 – 2)
  • Structure: 2 Compulsory Practical Questions (Question 1: Titration / Volumetric Analysis - 21 Marks; Question 2: Qualitative Analysis - 9 Marks)

  It covers the following topics:

  • Standard volumetric titration of a dibasic organic acid against standard sodium hydroxide solution
  • Titration data recording, concordant titre selection, and average volume computations
  • Stoichiometric calculations: mass concentrations, molarity, reacting mole ratios, and relative formula mass of an unknown acid
  • Determination of the unknown elemental mass in a dibasic acid formula
  • Qualitative analysis: physical appearance, solubility profiling, and aqueous observations of an inorganic salt
  • Systematic cation and anion identification using aqueous ammonia precipitation and confirmatory barium nitrate tests with dilute nitric(V) acid
• File Size:

  31.88 KB
• Category:

  Exams
• Level:

  Form 3
• Subject:

  Chemistry
• Posted By:

  Caleb_Peter

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