RI 2025 Planning Experiment (II)

2025 Year 6 H2 Chemistry Planning Experiments Lecture 2 Raffles Institution 1 Raffles Institution Year 6 H2 Chemistry 2025 Planning Experiments Lecture 2 Gravimetry, Gas Collection, Energetics and Kinetics TAMP Framework When approaching planning questions, it is important to 1. know the typical steps (processes) involved in different types of experiments 2. interpret and incorporate information provided in the question in your plan. We are going to use the TAMP framework to help you organise information from the question to write a clear and coherent plan. What does it stand for: What do you have to do: Topic & Aim Identifying the Topic tested and the Aim of the experiment narrows the scope of your thinking quickly. The Process involved for the experiment should come to mind. Analyse clues Identify and Analyse the clues / information given in the question which can be found in 1. description of experiment 2. apparatus provided 3. chemicals provided 4. bulleted points in question Analyse the clues / information allows you to appropriately adapt the typical Process for that particular experiment. Measurements Decide and write down the quantities of the chemicals to be used and measured. Some of these quantities may be  assumed to take particular values, or  calculated based on Clues or your assumptions. Process TAM involves you responding the unique question presented. Each type of experiment has a typical series of steps and considerations i.e. Process, which you can / should remember. How much of the typical series of steps and considerations is used in your answer depends on what you have Analysed previously. In these lecture, we will be 1. going into the considerations in planning the different topics. 2. highlight the typical steps and considerations i.e. Process in the different topics. 3. solve worked examples using the TAMP framework to adapt the Process to situation presented in the question.

2025 Year 6 H2 Chemistry Planning Experiments Lecture 2 Raffles Institution 2 Common apparatus for gravimetric analysis using thermal decomposition  electronic mass balance  crucible / boiling tube  desiccator GRAVIMETRIC ANALYSIS Gravimetry involves the accurate measurement of mass as a means of quantifying a sample. The substance to be weighed may be formed from thermal decomposition or by precipitation. THERMAL DECOMPOSITION This method involves heating a compound until it decomposes to give a solid residue and a gaseous product. General procedure:  Record the mass of an empty boiling tube/crucible.  Weigh accurately m g of the compound in the boiling tube. Record total