Uganda Adavanced Certificate Of Education Level Secondary Curriculum End Of Term One Examination Senior Five Chemistry Paper 2

Name……………………………………………………………………………………………… ………………………………… Signature……………………………………. …… Combination……… ……………………………………. P525 / 2 CHEMISTRY PAPER 2 APRIL, 2025 2 ¼ HOURS Uganda Advanced Certificate of Education (ADVANCED LEVEL SECONDARY CURRICULUM) END OF TERM ONE EXAMINATIONS – 2025 S.5 CHEMISTRY Paper 2 2 Hours 15 Minutes INSTRUCTIONS TO SEMI -CANDIDATES This paper consists of one compulsory item. Use the spaces provided to respond to the item. Kindly be tidy in your presentation. Work in pencil will not be scored. Use a blue or black ink. Mathematical calculators may be used. You are not allowed to use the apparatus for the first 15 minutes. Use this time to check that you have all reagents and apparatus you need. Item one A pharmaceutical company is in the process of making a better laxative for constipation patients to replace Bisacodyl that has m ore side effects . Sodium sulphate has been suggested as an alternative. However, the chief chemist has advised that the preffered stock solution of sodium sulphate is that obtained using an alkali with a molar concentration above 1M and an acid of less than 1M. Sodium sulpha te can be prepared by a reaction between sodium hydroxide solution and dilute sulphuric acid. One of the inter n students would wish to know whether the alkalis found in the company stores is suitable . You are provided with the following from the company stores BA1 which is a solution of sodium hydroxide of unknown concentration BA2 which is a 0.05M sulphuric acid solution. Task : As a learner of chemistry, (a) Design an experiment that can be used to guide the internee . (In your design, only include; aim, apparatus and materials, procedure, risk and mitigation) _______________________________________________________ _______________________________________________________ _______________________________________________________ _______________________________________________________ _______________________________________________________ _______________________________________________________ _______________________________________________________ _______________________________________________________ _______________________________________________________ _________________ ______________________________________ _______________________________________________________ _______________________________________________________ _______________________________________________________ _______________________________________________________ ______________________________________________________ (b) Carry out the …