Copy of VS 2024 Sec 4 Chem Prelim Paper 3 Lab Requisition

1 Secondary 4 Chemistry Lab Requisition Name of experiment: 2024 Secondary 4 Preliminary Examination Please specify (teacher’s demo/individual/pair/group work): Individual Work No. apparatus (please indicate size) quantity (per std) remarks* 1 50 cm3 burette with tap 1 2 Filter funnel 1 3 Retort stand 1 4 Butterfly clamp 1 5 Styrofoam cup 1 6 250 cm3 beaker 2 1 Labelled “Waste” 7 Thermometer 1 8 50 cm3 measuring cylinder 1 9 Electronic balance 2 per lab 10 Stopwatch 1 11 250 cm3 conical flask 1 12 Test tube 5 13 Test tube holder 1 14 Test tube rack 1 15 Deionised water 1 16 Paper towel 1 17 Litmus paper 1 set 18 wooden splint 1 19 delivery tube 1 Note for remarks: Please state if apparatus should be dry, glass apparatus should be used, etc. No. chemicals concentr ation quantity (per std) remarks* 1 dilute sulfuric acid (Label as P) 0.5 M 250 cm3 2 aqueous sodium hydroxide (Label as Q) 1 M 250 cm3 3 Copper(II) carbonate : sodium chloride (Labelled: A) – 3.00g Mix in 75%:25% ratio by mass then weigh out *Follow O Level variation 4 aluminium foil – 1 1cm x 1cm Copper(II) nitrate and ammonium sulfate dissolved in water (Labelled: X) 1 M 30 cm3 Make 1 M solution of each chemical then mix in 75%:25% ratio 5 Copper(II) nitrate and ammonium chloride dissolved in water (Labelled: Y) 1 M 30 cm3 Make 1 M solution of each chemical then mix in 75%:25% ratio 6 aqueous silver nitrate 0.05M Standard bench reagent 7 aqueous sodium hydroxide 1 M Standard bench reagent aqueous barium nitrate 0.05M Standard bench reagent aqueous potassium iodide 0.05M Standard bench reagent 8 aqueous ammonia 1 M Standard bench reagent 9 dilute nitric acid 1 M Likely will need to top up Standard bench reagent 10 dilute sulfuric acid 0.5 M Standard bench reagent 11 limewater Standard bench reagent Note for remarks: Please state if chemicals should be bottled, packed or weighed beforehand. Also, if the chemicals need to be freshly prepared, etc.