Cambridge IAL Chemistry case studies
Cambridge IAL Chemistry · Put your knowledge to work in context.
Cambridge International AS & A Level Chemistry (9701) is a Cambridge Advanced qualification for learners who have completed Cambridge IGCSE Chemistry or an equivalent course and want to study chemistry, or a related science subject, at university. The syllabus builds on that earlier foundation and covers the main theoretical concepts fundamental to the subject, some current applications of chemistry, and a strong emphasis on advanced practical skills. The Cambridge IAL Chemistry case studies are 5 cases and about 2,264 words.
1Weak Acid Dilution: Faulty Meter or Normal Equilibrium?
During a practical on weak acids, a student prepares 100.0 cm3 of a 0.100 mol dm-3 solution of a monoprotic weak acid, HA. A calibrated pH meter reads pH 2.85 at 298 K.
448 words, about 2 min2Permanganate Titration of Oxidised Iron(II) Sulfate
An impure sample of iron(II) sulfate heptahydrate, FeSO4·7H2O, has been stored in a loosely stoppered bottle for two days. A student weighs 1.20 g of the sample, dissolves it in dilute sulfuric acid, and makes the solution up to 250.0 cm3 in a volumetric flask.
458 words, about 2 min3Esterification Yield and Le Chatelier's Principle
In an organic synthesis practical, a student refluxes a mixture of 0.20 mol ethanol and 0.10 mol ethanoic acid with a few drops of concentrated sulfuric acid as catalyst. After refluxing for 45 minutes, the mixture is distilled and the distillate is washed with sodium carbonate solution and dried.
424 words, about 2 min4Calorimetry: Weak Acid versus Strong Acid Neutralisation
A student determines the enthalpy change of neutralisation by mixing 50.0 cm3 of 1.00 mol dm-3 hydrochloric acid with 50.0 cm3 of 1.00 mol dm-3 sodium hydroxide in a polystyrene cup. Both solutions are initially at 21.0 °C.
458 words, about 2 min5Kinetics of the Propanone–Iodine Reaction
A student investigates the acid-catalysed reaction between propanone and iodine in aqueous solution: CH3COCH3 + I2 → CH3COCH2I + HI. The reaction is followed by measuring the absorbance of iodine in a colorimeter.
476 words, about 2 min