2025 SAJC H2 Chem Prelim P4_CI

Practical Preparation List Prelims 2025 label per candidate identity notes (hazards given in this column are for the raw materials) FA 1 150 cm3 0.150 mol dm–3 sodium thiosulfate Dissolve 37.23 g of Na2S2O3.5H2O in each dm3 of solution. FA 2 260 cm3 1.0 mol dm–3 sulfuric acid See preparation instructions in the current syllabus. FA 3 60 cm3 1.00 mol dm–3 KI Dissolve 166.0 g of KI in each dm 3 of solution. FA 4 150 cm3 0.130 mol dm–3 CuSO4 Dissolve 32.5 g of CuSO4.5H2O [MH] [N] in each dm 3 of solution. starch indicator 15 cm3 starch indicator FA 5 200 cm3 1.9 mol dm–3 NaOH Dissolve 76.0 g of NaOH in each dm3 of solution. FA 6 30 cm3 0.1 mol dm–3 CuSO4 with 0.8 mol dm–3 Al2(SO4)3 Dissolve 24.97 g of CuSO4.5H2O [MH] [N] in each dm 3 of solution. Dissolve 533.14 g of Al2(SO4)3.18H2O in each dm 3 of solution. FA 7 30 cm3 0.1 mol dm–3 NH4Cl Dissolve 5.349 g of NH4Cl in each dm 3 of solution. FA 8 30 cm3 0.1 mol dm–3 Glucose solution Dissolve 19.80 g of D(+) Glucose in each dm 3 of solution. Bench Reagents 1) aqueous sodium hydroxide 2) aqueous ammonia 3) aqueous barium nitrate 4) aqueous silver nitrate (concentration for Tollen’s Reagent), 5) dilute nitric acid 6) limewater 7) starch indicator