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Chemistry Connect Senior Five End Of Year Assessment Uganda Adavanced Certificate Of Education Chemistry Paper Two

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PDF 319.22 KB 5 pages Jul 23, 2026
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1 TEL/Whatsaap: +256 -756188387 Student’s Name:…… ……………………………….……………………… Signature : ………………… 525/ 2 CHEMISTRY Paper 2 2025 2 Hours Oct./Nov, 2025 CHEMISTRY - CONNECT S5 END OF YEAR ASSESSMENT Uganda Advanced Certificate of Education CHEMISTRY Paper 2 2 Hours INSTRUCTIONS TO STUDENTS: This paper of one compulsory item . Responses to this item must be written in the spaces provided. A graph paper will be provided. FOR EXAMINER’S USE ONLY CODE A H V R&M P DR DP AN R&C TOTAL SCORE SCORE 2 TEL/Whatsaap: +256 -756188387 ITEM : A community water -treatment project in Mbarara purchases large quantities of sodium carbonate decahydrate (Na₂CO₃·10H₂O) to soften hard water before domestic distribution. During transportation and storage, some of the salt was kept in a metallic storehouse with poor ventilation. When the treated water later showed reduced effectiveness in removing hardness, the plant technician suspected that the sodium carbonate had lost part of its water of crystallization , forming a compound of formula Na₂CO₃·nH₂O inste ad of Na₂CO₃·10H₂O. The management asks a team of chemistry learners to determine the actual value of n to confirm whether dehydration has occurred and if the chemical still meets standard specifications. You are provided with • 5.0 g of substance Z • 7.0 g of substance X, the suspected sodium carbonate hydrate (Na₂CO₃·nH₂O) • FA1 – approximately 0.125 M aqueous sulphuric acid • Some laboratory apparatus (Z reacts with sulphuric acid in a mole ratio of 1:1 and has a formula mass of 106 g. F A2 is prepared by dissolving exactly 2.0 g of substance Z in 250 cm³ of solution, while F A3 is prepared by dissolving exactly 6.5 g of substance X in 250 cm³ of solution .) (H = 1; C = 12; O = 16; Na = 23) Task : As a …
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Chemistry Connect Senior Five End Of Year Assessment Uganda Adavanced Certificate Of Education Chemistry Paper Two, is an educational document on StudyUganda.com. This resource includes: "1 TEL/Whatsaap: +256 -756188387 Student’s Name:…… ……………………………….……………………… Signature : ………………… 525/ 2 CHEMISTRY Paper 2 2025 2 Hours Oct./Nov, 2025 CHEMISTRY - CONNECT S5 END ……" (Format: PDF) — 319.22 KB, 5 pages. Added July 23, 2026.

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