Chemistry · 2008 · November · Paper 2 · HL · Question paper

8808-6102 15 pages N08/4/CHEMI/HP2/ENG/TZ0/XX Tuesday 11 November 2008 (afternoon) CHEMISTRY HIGHER l Ev El Pa PER 2 INSTRUCTIONS TO CANDIDATES • Write your session number in the boxes above. • Do not open this examination paper until instructed to do so. • Section A: answer all of Section A in the spaces provided. • Section B: answer two questions from Section B. Write your answers on answer sheets. Write your session number on each answer sheet, and attach them to this examination paper and your cover sheet using the tag provided. • At the end of the examination, indicate the numbers of the questions answered in the candidate box on your cover sheet and indicate the number of sheets used in the appropriate box on your cover sheet. 2 hours 15 minutes [Personal identifier removed] © International Baccalaureate Organization 2008 88086102 0115 8808-6102 – 2 – N08/4/CHEMI/HP2/ENG/TZ0/XX Section a Answer all the questions in the spaces provided. 1. (a) The diagram shows the apparatus used to study the rate of reaction between calcium carbonate and hydrochloric acid. CaCO (s) 2 HCl(aq) C aCl ( aq) H O (l) CO (g)3 2 2 2+ → + + cotton wool dilute hydrochloric acid calcium carbonate The quantities of reactants added to the flask in one experiment carried out at room temperature were: mass of single piece of CaCO3(s) = 5.00 g volume of 1.00 mol dm–3 HCl (aq) = 50.0 cm3 The balance was set to zero at the start of the experiment. The graph shows how the mass of the flask and contents changed during Experiment 1. Mass of flask and contents / g 0.00 Time / min (This question continues on the following page) 0215 0.00 g