Ester Preparation | A‑Level Chemistry Exam Question Walkthrough | Required Practical 10 and PAG

This video is a full A‑Level Chemistry exam‑question walkthrough on ester preparation, taking you through the reaction, the practical steps, and the purification process exactly the way examiners expect. You can also download the full exam question using the link below: https://drive.google.com/file/d/1XVc2Mkt8O9JKtThRLnJFvO3FNcjfKFfT/view?usp=sharing Links directory for all YouTube videos: https://drive.google.com/file/d/1s3I5prjbJRR1U1lcKpXO9TQpQMaVoP66/view?usp=drive_link The walkthrough shows the exam‑marking points in purple, and the thinking‑out‑loud development and annotations in red/purple, so you can clearly see what earns marks and what helps you understand the chemistry. It covers the key ideas that appear in AQA Paper 2, AQA Required Practical 10, and the OCR PAG organic synthesis tasks. Perfect for anyone revising esterification, reflux, or purification of organic liquids. What this walkthrough covers Writing the esterification equation and naming esters How to set up and explain reflux (with diagram + safety points) Why we shake with sodium carbonate and what it removes Using anhydrous magnesium sulfate as a drying agent How to test the purity of the final ester Exam‑ready phrasing for each step Common mistakes students make and how to avoid them Chapters 00:00 Intro 00:05 Walkthrough structure 00:49 Esterification equation and naming esters 04:13 Reflux procedure, diagram and safety 11:19 Shaking with sodium carbonate 14:40 Anhydrous MgSO₄ and testing purity