2019 ACJC Prelim H2 Chem P3 Insert ANS

ANGLO-CHINESE JUNIOR COLLEGE DEPARTMENT OF CHEMISTRY Preliminary Examination CHEMISTRY H2 9729/03 Paper 3 Free Response 2 September 2019 2 hours Insert READ THESE INSTRUCTIONS FIRST Write your index number and name, form class and tutorial class on all the work you hand in. Write in dark blue or black pen. You may use an HB pencil for any diagrams or graphs. Do not use staples, paper clips, glue or correction fluid. The insert is for use in Question 1(a). Fasten the insert in front of all writing paper at the end of the examination. This document consists of 2 printed pages. 9729/03/Prelim/19 ANGLO-CHINESE JUNIOR COLLEGE © ACJC 2019 Department of Chemistry [Turn over

© ACJC 2019 9729/03/Prelim/09 2 Index No. Name Form Class Tutorial Class 2CH________ Subject Tutor For use in Question 1(a) 0.0000 0.0010 0.0020 0.0030 0.0040 0.0050 0.0060 0.0070 0.0080 0.0090 0.0100 0 20 40 60 80 100 120 [RI]/mol dm-3 time/min [OH–] = 0.10 mol dm–3 [OH–] = 0.15 mol dm–3 (39,0.0050) (78,0.0025) (116,0.0025) (58,0.0050) (96,0) (64,0)