Combustion Analysis | A level Chemistry Exam Question walkthrough

This video is a full A‑Level Chemistry exam‑question walkthrough on Combustion Analysis, taking you through the reasoning and calculations needed to deduce the formula of an unknown organic compound containing carbon, hydrogen and oxygen. You can download the full exam question using the link below: https://drive.google.com/file/d/13lMlWXJtzIZI0xtTYYnVQl6ppPVS15bA/view?usp=drive_link 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/blue, so you can clearly see what earns marks and what helps you understand the chemistry. This topic is relevant to all exam boards. For AQA, it links to the Required Practical on organic analysis and quantitative methods. For OCR, it aligns with PAG 4 (Quantitative Analysis) and PAG 7 (Qualitative Analysis), depending on the context. ⭐ What this walkthrough covers Using combustion analysis to deduce the formula of an unknown CHO compound Converting masses of CO₂ and H₂O into moles of carbon and hydrogen Determining the mass and moles of oxygen by subtraction Constructing and simplifying empirical formula ratios Checking consistency with the molar mass to find the molecular formula Understanding how examiners expect you to structure your working Seeing the difference between mark‑earning wording and supporting reasoning ⭐ Chapters 00:00 Intro & Socials 00:05 Combustion analysis to deduce the formula of an organic molecule ⭐ How this was made This walkthrough was created using slide‑based explanations, with colour‑coded annotations to separate exam‑marking points from the thinking process, so you can pause, rewatch and build your own written answers from the structure shown. 📲 Connect with Us: 📸 Instagram: @chemistrytutor123 🎵 TikTok: @chemistrytutor123 📧 Email: thechemistrytutor123@gmail.com