JCE Chemistry case studies
JCE Chemistry · Put your knowledge to work in context.
The JCE Chemistry examination is a school-leaving qualification in chemistry, taken by candidates who have completed the junior-cycle science programme and who need a formal record of their achievement in the subject. It is used for progression into senior-cycle chemistry, for entry to technical and vocational courses, and as evidence of basic chemical literacy for employers and training providers. The JCE Chemistry case studies are 5 cases and about 2,485 words.
1Limestone Purity and an Acid Spill
A technician at a quarry donates 2.00 g samples of crushed limestone to a school for a neutralisation demonstration. The label says the rock is 'at least 90% calcium carbonate'.
516 words, about 3 min2Lime and Ammonium Sulfate Applied Together
A market gardener has a 10 m² plot with soil pH 4.6. To raise the pH quickly before planting cabbages, she spreads 2.0 kg of quicklime (calcium oxide) over the plot.
456 words, about 2 min3Copper Plating a Steel Key
A student tries to copper-plate a steel key for a technology project. She uses a 250 cm³ beaker containing 0.50 mol/dm³ copper(II) sulfate solution, a copper strip anode and the key as cathode, connected to a 3.0 V supply.
511 words, about 3 min4Zinc from a Carbonate Ore
A student is given 5.0 g of an ore that is mainly zinc carbonate, ZnCO₃, mixed with sand. She strongly heats a sample in a hard-glass test tube and observes a yellow solid when hot, which turns white on cooling, while the gas produced turns limewater milky.
466 words, about 2 min5Choosing a Fuel for a Small Pump Engine
A science club compares ethanol and petrol as fuels for a small four-stroke engine used to drive a water pump. Burning 1.00 g of ethanol raises the temperature of 100 g of water by 28.0 °C.
536 words, about 3 min