Summary

• Description:

  The MS Word document comprises KCSE 2026 Chemistry Paper 3 Prediction Paper with Answers (Set 5). The PDF version is also available upon your request. The marking scheme is in a different document.

  It was a KCSE Chemistry Paper 3 prediction examination designed to prepare candidates for the national assessment.

  This practical examination tests core quantitative and qualitative laboratory competencies. It focuses on thermochemical measurements, back-titration analysis, and systematic qualitative analysis for organic functional groups and inorganic cation/anion identification.

  • Duration: 2 ¼ Hours
  • Total Marks: 40
  • Number of Questions: 3 (Questions 1 - 3)
  • Structure: Three compulsory laboratory practical tasks covering thermochemistry/titration, organic qualitative analysis, and inorganic qualitative analysis

  It covers the following topics:

  • Question 1: Thermochemistry and Volumetric Analysis
    • Enthalpy of Reaction: Magnesium and Hydrochloric Acid Thermometric Titration and Temperature-Time Graphs
    • Molar Heat Calculations: Heat Change, Limiting Reactants, and Molar Enthalpy Change of Solution
    • Acid-Base Titration: Neutralisation of Excess Unreacted Hydrochloric Acid Using Standard Sodium Hydroxide
    • Quantitative Stoichiometry: Solution Molarity Calculations and Back-Titration Volumetric Analysis
  • Question 2: Qualitative Organic Analysis
    • Combustion and Flammability Testing (Sootiness and Saturation)
    • Solubility and Miscibility in Water
    • Carboxylic Acid / Functional Group Testing with Sodium Hydrogen Carbonate
    • Redox Testing with Acidified Potassium Dichromate (VI) for Alcohols / Carbonyls
  • Question 3: Qualitative Inorganic Analysis
    • Solubility and Separation of Cation Mixtures via Filtration
    • Precipitation Reactions Using Aqueous Sodium Hydroxide and Ammonia Solution (Dropwise and in Excess)
    • Confirmatory Anion and Cation Testing with Dilute Nitric (V) Acid and Dilute Hydrochloric Acid with Warming
• File Size:

  59.52 KB
• Length:

  6 pages
• Category:

  KCSE Prediction Papers
• Level:

  Form 4
• Subject:

  Chemistry
• Posted By:

  Caleb_Peter

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