RVHS Prelim_H2_Chemistry_P4_CI

RVHS J2 H2 CM Prelim 2025 Place the following on the Teacher’s Bench • 6 additional sets of apparatus • 6 additional sets of chemicals Please store the chemicals away from hot windows to avoid degradation. Chemical Description Label (if any) Quantity per student Remarks Bench reagents (see above) 1 set − 0.10 mol dm−3 iron(II) sulfate FeSO4 mixed with 0.10 mol dm−3 silver nitrate 1. Allow mixture to equilibrate overnight before bottling 2. Bottling: Stir continuously and pour the mixture into each bottle (Please prepare within the week) FA 1 80 cm3 Dissolve 13.9 g of FeSO4.7H2O in 500 cm3 of 0.5 mol dm−3 of sulfuric acid To prepare 0.5 mol dm−3 H2SO4 solution, cautiously pour 27.5 cm3 of conc H2SO4 (95-97%) into 500 cm3 DI water and make solution up to 1dm3 To prepare 0.1 mol dm−3, dissolve 8.49 g of AgNO3 in 500 cm3 of water Mix 500 cm3 of each together. Equilibrate overnight. 0.010 mol dm −3 potassium thiocyanate (Please prepare within the week) FA 2 120 cm3 Dissolve 0.9718 g of KSCN in each dm3 of solution 1.90 mol dm−3 NaOH (Please prepare within the week) FA 3 60 cm3 76 g of NaOH in each dm3 of solution 2.00 mol dm−3 HCl (Please prepare within the week) FA 4 100 cm3 0.2 mol dm−3 manganese (II) chloride (Please prepare within the week) FA 5 10 cm3 Dissolve 25.2g of MnCl2 or 39.6g of MnCl24H2O in each dm3 of solution 0.200 mol dm−3 ammonium iron(II) sulfate (Please prepare one day in advance) FA 6 20 cm3 Dissolve 78.4g of Fe(NH4)2(SO4)2•6H2O in each dm3 of solution

0.0200 mol dm−3 KMnO4 (Please prepare within the week) FA 7 10 cm3 Dissolve 3.16 g of KMnO4 in each dm3 of solution Aqueous starch Aqueous starch 5 cm3 Starch solution Hydrogen peroxide Hydrogen peroxide 5 cm3 Others Deionised water - 1 large bottle Table 2: Bench reagents (in reagent rack) on student’s bench Description Label 2 mol dm–3 HCl HCl(aq) 2 mol dm–3 HNO3 HNO3(aq) 1 mol dm–3 H2SO4 H2SO4(aq) 2 mol dm–3 NaOH NaOH(aq) 0.2 mol dm–3 Ba(NO3)2 Ba(NO3)2(aq) 0.05 mol dm–3 AgNO3 Approx. shelf life 3 to 4 months in amber bottle (not air tight) AgNO3(aq) 0.1 mol dm–3 KI KI(aq) Litmus papers 2 red 2 blue

List of Apparatus Description Quantity per student Remarks Q1 Q2 Q3 Total 50.00 cm3 Burette 1 1 2 Clamp with retort stand. To check the tips and replaced if chipped. Label “Q1” and “Q2” on burettes. 25.0 cm3 Pipette 1 1 10.0 cm3 Pipette 1 1 Retort stand and clamp 1 1 2 Pipette filler 1 1 Place in a large basket. 250 cm3 beaker 1 1 Polystyrene cup 1 1 Thermometer graduated to 1C 1 1 Filter funnel 1 1 2 250 cm3 conical flask 2 2 ignitor 1 1 plastic teat pipettes 5 5 Place in chemical baskets Paper towel 2 1 3 Test-tube 7 7 Slotted in a test-tube rack Boiling-tube 1 1 Brushes (suitable size for test-tube) 1 1 Test-tube holder 1 1 Glass rod 1 1 Delivery tube, must fit test-tube 1 1 Wooden splint 1 1