YIJC 2025 Prelim Practical CI_H2 Chem

1 CHEMISTRY LAB PREPARATION LIST FOR JC2 H2 CHEMISTRY APPARATUS NEEDED (PER STUDENT) S/N Apparatus Quantity Location Remarks (Reuse or new for each batch) 1 Burette 2 Student’s bench Reuse 2 Burette stand and clamp 1 Student’s bench Reuse 3 250 cm3 beaker 2 Student’s bench Reuse 4 Funnel (for filling burette) 2 Student’s bench Reuse 5 250 cm3 volumetric flask 1 Student’s bench Reuse 6 Wash bottle containing distilled water 1 Student’s bench Reuse 7 250cm3 conical flask 2 Student’s bench Reuse 8 25.0 cm3 pipette 1 Student’s bench Reuse 9 Pipette filler 1 Student’s bench Reuse 10 Red and blue litmus papers Small basket Pack together for students to use 11 Universal Indicator paper and colour chart Small basket Pack together for students to use 12 plain filter strips for use with acidified manganate(VII) Small basket Pack together for students to use 13 aluminium foil for testing nitrate/nitrite Small basket Pack together for students to use 14 wooden splints Small basket Pack together for students to use 15 Paper towel Small basket Pack together for students to use 16 Pen/Marker Small basket Pack together for students to use 17 Clean and dry Styrofoam cups of capacity 150 cm3 with lid 2 Small basket Must change to new one per shift 18 Measuring Cylinder of capacity 50cm3 1 Student’s bench Reuse 19 Thermometer (range of -5°C to 50°C, graduated to 0.2°C) 1 Student’s bench Reuse 20 Stopwatch reading to at least 0.1s 1 Student’s bench Reuse 21 Dropping pipette 3 Small basket Must change to new one per shift 22 spatula 1 Small basket Must change to new one per shift 23 Test tube holder 1 Student’s bench Reuse 24 Boiling Tube approximately 150 mm × 25 mm 3 Small basket Must change to new one per shift 25 Test tube approximately 125 mm × 15 mm 8 Small basket Must change to new one per shift

2 26 Test tube rack 1 Student’s bench Reuse 27 Delivery tube (connect to test tube) 1 Student’s bench Reuse Communal apparatus: Weighing balance, reading to 0.01g or better (1 per 8 candidate) All must show readings to the same precision Hot water CHEMICALS NEEDED (PER STUDENT) Label Per Candidates Identity Notes FA 1 150 cm3 0.0625 mol dm–3 NaOH + 0.05 mol dm–3 Na2CO3 (anhydrous) Mixture FA 2 200 cm3 1.5 mol dm–3 HCl FA 4 2.80 g sodium hydrogencarbonate FA 5 5 g Mixture of approximately equal masses of ammonium chloride and hydrated zinc sulfate 5.0g ± 0.1g mixture containing NH4Cl and ZnSO4.7H2O in approximately ratio 1:1 by mass. The solids should be well mixed and supplied in a stoppered container. FA 6 20 cm3 20 g glucose + 50 cm3 1 mol dm-3 H2SO4 Solution T Thymolphthalein indicator Solution M Methyl Orange Indicator

3 STANDARD BENCH REAGENTS S/N Label Identity Notes (hazards given in this column are for the raw materials) 1 Dilute hydrochloric acid 2.0 mol dm-3 HCl 2 Dilute nitric acid 2.0 mol dm-3 HNO3 [C] 3 Dilute sulfur