In I/GCSE Chemistry, we will learn about innovations in green chemistry .
Innovations
Regulations are put in place for the storing and transporting of chemicals. Hazard symbols and sealed containers prevent harm from coming to people + environment.
In I/GCSE Chemistry, Preventing pollution: 1) New method 2) Use renewable + cost effective resources
Green chemistry benefits:
- Increases efficiency 2) Reduces cost 3) Avoid risks
In I/GCSE Chemistry, Reducing use of petrochemicals, e.g. crude oil, will be more sustainable.
Rather, you should ferment renewable plant material using bacteria --> produces MALANIC ACID --> produces sorona --> used for clothes
Advantages | Disadvantages |
Renewable | Takes up land meant for food |
Less energy used | Energy needed to produce more fertilisers + for harvesting |
Fewer emissions |
|
Saves crude oil |
|
Yields
In I/GCSE Chemistry, Yield - efficiency of method
- Compares quality with predicted quality
High yield = good but doesn’t mean that process is “green”.
Working out percentage yield
E.g. 10g of CaCO3 is heated for 20mins. The product is 4.8g of CaO. What is the percentage yield?
Atom economy
= the efficiency --> how much product ends up as reactant
Formula: RAM of product / RAM of reactant x 100
Atom economy: 56 / 100 x 100 = 5.6%
You got it now!