EJC 2024 H2 Chemistry Practical Planning Handbook

EJC Chemistry Practical Planning Handbook H2 Chemistry / 9729 Eunoia Junior College Page 1 Contents OVERVIEW ................................ ................................ ..................... 2 TYPE OF PLANNING ................................ ................................ ........ 2 WRITING A PLAN ................................ ................................ ............ 2 1. DEFINING THE PROBLEM ................................ ............................. 5 1.1. For a quantitative exercise ................................ ................. 5 1.2. For a qualitative exercise ................................ ................... 5 2. METHOD ................................ ................................ .................... 5 3. PLANNING ANALYSIS, CONCLUSIONS AND EVALUATION ................ 5 3.1. Analysing Data ................................ ................................ .. 5 3.1.1. Calculations ................................ ............................. 5 3.1.2. Error analysis ................................ .......................... 5 3.2. Evaluation................................ ................................ .......... 6 3.3. Drawing Conclusions ................................ ......................... 6 BASIC LABORATORY PROCEDURES ................................ ................. 6 A. Balances and Weighing ................................ ..................... 6 B. Working with Liquids ................................ .......................... 6 C. Preparation of an aqueous solution of known concentration from a solid chemical ................................ ......................... 7 D. Preparation of an aqueous solution of known concentration (standard solution) from a solid chemical for use in quantitative analysis ................................ .......................... 7 E. Temperature Measurement ................................ ............... 7 F. Filtration ................................ ................................ ............ 8 G. Heating ................................ ................................ .............. 8 H. Cooling ................................ ................................ .............. 8 I. Drying Glassware ................................ .............................. 8 J. Drying Solids ................................ ................................ ..... 8 K. Drying Liquids ................................ ................................ .... 9 L. Pressure of Gas................................ ................................ . 9 M. Gas Collection and Volume Measurement ......................... 9 N. Time Measurement ................................ .......................... 10 LABORATORY TECHNIQUES ................................ ........................... 10 A. Melting points ................................ ................................ .. 10 B. Recrystallisation ................................ ....