Colorimeter Use in AS & A Level Biology & Chemistry
Credit: Microbes Notes Practical Handbook Page (Cambridge-aligned) 1. Purpose of this Page This page supports teachers in selecting, justifying, and assessing the use of a colorimeter in AS & A Level practical work. It aligns with Cambridge International Biology (9700) and Chemistry (9701) practical skill frameworks. 2. Why Use a Colorimeter at AS & A Level? Measures absorbance of coloured solutions Allows quantitative comparison of concentration and reaction rates Appropriate for school laboratories Develops key skills: measurement, data handling, evaluation Note: A spectrophotometer offers higher precision, but a colorimeter is fully acceptable for most AS investigations and many A Level contexts. 3. Practical Skill Codes (Cambridge Framework) Biology (9700) P – Planning M – Manipulation & measurement O – Observation A – Analysis E – Evaluation Chemistry (9701) P – Planning M – Manipulation & measurement A – Analysis & evaluation Biology (9700) – Inve...
