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Uganda Advanced Certificate Of Education Uace Chemistry Paper 1 Theory

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Uganda Advanced Certificate of Education (UACE) – Chemistry Paper 1 (Theory) Time: 2 hours 45 minutes “Prepared by Teacher Joel PCM – Designer of Physics, Chemistry & Mathematics Item Banks. For more explanations and practice, search for us on YouTube.” Instructions: Answer all questions in Section A. In Section B, attempt 1 item from Part I and 1 item from Part II. Write your answers as reports, analyses, or recommendations, using data provided where applicable. SECTION A – Compulsory Items Item 1 – AO3 (Quantitative Chemistry / Thermochemistry / Kinetics) A fertilizer company produces ammonia (NH ₃ ) by reacting nitrogen with hydrogen under controlled conditions. In a trial experiment, 10.0 g of nitrogen is combined with 3.0 g of hydrogen. After 1 hour, only 2.5 g of hydrogen has reacted. The company observes that the reaction rate doubles when the temperature is raised from 298 K to 318 K. The enthalpy change of the reaction is measured as -92 kJ/mol. Task: Write a detailed scientific report analyzing: Which reactant is limiting. The expected quantity of ammonia formed. The efficiency of the reaction compared to the theoretical maximum (percentage yield). How temperature affects the reaction rate, referencing kinetic principles. Item 2 – AO4 (Equilibrium & Electrochemistry) A laboratory investigates a solution containing 0.50 M Fe² ⁺ and 0.10 M Fe³ ⁺ in acidic medium. A platinum electrode is immersed and connected to a standard hydrogen electrode. The reduction potential for Fe³ ⁺ /Fe² ⁺ is +0.77 V. Task: Prepare a scientific report that: Determines the electrode potential using the Nernst equation. Explains the effect of changing ion concentrations on the potential. Predicts how equilibrium shifts when additional Fe² ⁺ is added. Suggests one real-life application of this redox system in industry. SECTION B – Optional Items Part I – AO1 …
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Uganda Advanced Certificate Of Education Uace Chemistry Paper 1 Theory, is an educational document on StudyUganda.com. This resource includes: "Uganda Advanced Certificate of Education (UACE) – Chemistry Paper 1 (Theory) Time: 2 hours 45 minutes “Prepared by Teacher Joel PCM – Designer of Physics, ……" (Format: PDF) — 4.11 MB, 5 pages. Added July 23, 2026.

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