Cameroon GCE O-Level Chemistry case studies
Cameroon GCE O-Level Chemistry · Put your knowledge to work in context.
The Cameroon GCE Ordinary Level Chemistry is a school-leaving and progression qualification administered under the Cameroon General Certificate of Education system. It is taken mainly by candidates near the end of secondary schooling who need a science subject pass for further study, teacher training, nursing, laboratory work or technical employment. It is also used by private candidates improving their grades. The syllabus builds a working model of matter: particles and the kinetic theory, atomic structure and periodicity, bonding, the mole and equations, acids, bases and salts, reaction rates, energetics and equilibrium, redox and electrolysis, the chemistry of metals and non-metals, organic families and fuels, plus laboratory skills and qualitative analysis. The Cameroon GCE O-Level Chemistry case studies are 5 cases and about 2,791 words.
1When Does the Fizzing Really Stop?
In a school laboratory in Bamenda, a student adds 1.00 g of washed marble chips (assume pure calcium carbonate, M = 100 g mol⁻¹) to 25.0 cm³ of 1.00 mol dm⁻³ hydrochloric acid at 25 °C. The gas produced is collected in a 250 cm³ gas syringe.
588 words, about 3 min2Checking a Fertiliser Label
A student analyses a 1.32 g sample of ammonium sulphate fertiliser, labelled 95% pure. The sample is warmed with excess sodium hydroxide and the ammonia produced is passed into 50.0 cm³ of 0.500 mol dm⁻³ hydrochloric acid.
618 words, about 3 min3The Air Bubble and the Discarded Titre
A titration is carried out to find the concentration of a hydrochloric acid solution. Anhydrous sodium carbonate (1.325 g, M = 106 g mol⁻¹) is dissolved in distilled water and made up to 250 cm³ in a volumetric flask.
522 words, about 3 min4Why the Copper Deposit Is Too Light
A student electroplates a brass spoon with copper using a copper anode and a copper(II) sulphate solution. The spoon is cleaned, weighed (24.80 g), and made the cathode.
528 words, about 3 min5Four Unlabelled Bottles
During a practical class, four reagent bottles have lost their labels. The teacher knows the bottles contain sodium carbonate, aluminium sulphate, potassium chloride and copper(II) sulphate.
535 words, about 3 min