GCSE Chemistry – Atom Economy – Calculations | Why it’s Important (2026/27 exams)

⭐️ Check out our website https://www.cognito.org/ ⭐️

*** WHAT’S COVERED ***
1. The concept of atom economy.
* How chemical reactions often produce useful products alongside waste products.
* Atom economy as a measure of how efficiently reactants are converted into desired products.
2. How to calculate atom economy.
* The equation for atom economy using the relative formula mass (Mr) of reactants and desired products.
* A worked example of a reaction with a low atom economy (production of hydrogen).
* A worked example of a reaction with a 100% atom economy (production of ammonia).
3. The importance of a high atom economy.
* Economic reasons (cost of raw materials).
* Environmental and sustainability reasons (reducing waste).
4. Methods for improving the efficiency of a chemical process.
* Finding alternative reaction pathways with higher atom economy.
* Finding uses for waste products, turning them into useful by-products.
5. Other factors to consider when choosing a reaction pathway.
* Percentage yield, cost of raw materials, position of equilibrium, rate of reaction, and the cost of maintaining conditions.

*** EXAM BOARD SPECIFIC INFO ***
AQA – Separate/triple science only
IGCSE Edexcel – Not in your course!
Edexcel – Separate/triple science only
OCR 21st Century – Separate/triple science only
OCR Gateway – Separate/triple science only

*** CHAPTERS ***
0:00 Introduction
0:55 The Atom Economy Equation
1:23 Worked Example: Low Atom Economy
2:50 Worked Example: High Atom Economy
3:21 Why Atom Economy is Important
3:57 Improving Atom Economy

*** PLAYLISTS ***

#GCSE #Chemistry #study #revision #school #exam #AQA #OCR #Edexcel #IGCSE