Summary

• Description:

  The PDF document comprises Mirror Jet 2024 Chemistry Paper 3 Exam with Answers and Marking Scheme. The marking scheme is in a different document.

  It was a KCSE Chemistry (Practical) Paper 3 (233/3) examination administered during the Mirror Jet Exams Term Two 2024 series.

  • Duration: 2 Hours 15 Minutes
  • Total Marks: 40
  • Number of Questions: 3
  • Instruction: Candidates answered all questions using the apparatus and chemicals provided.

  The paper assessed practical chemistry skills including titration, solubility experiments, qualitative analysis and identification of unknown compounds. :contentReference[oaicite:0]{index=0}

  It covered the following practical experiments and topics:

  • Determination of solubility of a hydrated organic acid (oxalic acid crystals)
  • Measurement of temperature during crystallization to determine solubility
  • Plotting and interpretation of solubility curves from experimental data
  • Determining solubility values at specific temperatures using graphs
  • Calculation of mass of crystals deposited when solutions are cooled
  • Preparation of solutions using volumetric flasks and dilution techniques
  • Acid–base titration using sodium hydroxide and phenolphthalein indicator
  • Calculation of average titre values and molarity of solutions
  • Determination of the water of crystallization (value of n) in hydrated oxalic acid
  • Qualitative analysis of an unknown mixture using filtration and chemical reagents
  • Identification of cations using sodium hydroxide and ammonia solutions
  • Flame tests for identification of metal ions
  • Tests for anions using acidified barium nitrate solution
  • Identification of an unknown organic compound using chemical tests
  • Reactions with potassium manganate (VII) and bromine water to identify functional groups
• Category:

  Mock Past Papers
• Level:

  Form 4
• Subject:

  CHEMISTRY

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