BGCSE Chemistry 0570 case studies
BGCSE Chemistry 0570 · Put your knowledge to work in context.
BGCSE Chemistry 0570 is a secondary-school science qualification taken in Botswana, typically at the end of the two-year senior secondary cycle. It is designed for learners who need a solid grounding in chemistry either as a terminal science subject or as preparation for further study in the physical and biological sciences, health-related fields, engineering, agriculture and applied technology. The BGCSE Chemistry 0570 case studies are 5 cases and about 2,336 words.
1The Damp Fertiliser Store
A farm store holds 40 kg bags of ammonium nitrate fertiliser stacked against a north-facing concrete wall. Over winter the wall becomes damp and the bags nearest it clump into hard lumps.
502 words, about 3 min2Choosing a Method to Find the Concentration of Vinegar
A student is given a bottle of clear white vinegar labelled '5% acidity' and must check the claim using school apparatus. Available: a 25 cm3 pipette, a burette, conical flasks, a balance reading to 0.01 g, a 250 cm3 volumetric flask, phenolphthalein, and a standard 0.100 mol/dm3 sodium hydroxide solution.
448 words, about 2 min3The Rusting Gate and the Sacrificial Anode
A steel gate on a coastal footpath rusts badly within two years, especially along its lower bars where salt spray collects. A maintenance team proposes three options: (A) repaint the gate every year with an ordinary paint; (B) attach blocks of magnesium to the lower bars; (C) attach blocks of copper to the lower bars.
454 words, about 2 min4The Exothermic Reaction in a Water Bath
A student mixes 50 cm3 of 1.0 mol/dm3 hydrochloric acid with 50 cm3 of 1.0 mol/dm3 sodium hydroxide in a polystyrene cup, recording the temperature every 30 s. The temperature rises from 21.0 °C to 27.8 °C.
472 words, about 2 min5Testing a Water Sample from a Borehole
A village borehole supplies water that lathers poorly with soap and leaves white scale in kettles. A sample gives a white precipitate with sodium carbonate solution and a white precipitate with dilute ammonia solution that dissolves only partly in excess ammonia.
460 words, about 2 min