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Atom Economy in a Snap! Unlock the full A-level Chemistry course at http://bit.ly/31DbON0 created by Ella Buluwela, Chemistry expert at SnapRevise. SnapRevise is the UK’s leading A-level and GCSE revision & exam preparation resource offering comprehensive video courses created by A* tutors. Our courses are designed around the OCR, AQA, SNAB, Edexcel B, WJEC, CIE and IAL exam boards, concisely covering all the important concepts required by each specification. In addition to all the content videos, our courses include hundreds of exam question videos, where we show you how to tackle questions and walk you through step by step how to score full marks. Sign up today and together, let’s make A-level Chemistry a walk in the park! The key points covered in this video include: 1. What is Atom Economy? 2. Worked Example 3. Importance 4. Types of Reactions What is Atom Economy? The mass of the product that we want as a % of the mass of all the products we make. Atom Economy = Mass of Desired Product / Mass of all Products x 100% Worked Example What is the atom economy for the production of CH2Cl2 for the following reaction: 2Cl2 + CH4 → CH2Cl2 + 2HCl Importance Chemical reactions can produce unwanted by-products. These are waste products. Improving atom economy can reduce this chemical waste. More sustainable, Minimise waste, Maximise efficiency. Types of Reactions Addition Reactions: 100% atom economy, No by-products. Substitution and Elimination Reactions: less than 100% atom economy. Summary Proportion of desired products compared with all products formed Addition Reactions: 100% Elimination and Substitution Reaction: less than 100%
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