C5.1.2 - Percentage yield and atom economy Flashcards
1
Q
What is the actual yield?
A
It is the mass of product you actually make in a chemical reaction
2
Q
How do you calculate percentage yield?
A
(Actual yield/Theoretical Yield) x 100
3
Q
What affects percentage yield?
A
- The reactants may react in a different way than expected
- The reaction may not go to completion - some of tje reactants present do not react
- You may lose some of the product when separate it from the reaction mixture and purify it
4
Q
What is atom economy?
A
It is a measure of how many atoms in the reactants form a desired product
5
Q
What is the equation for atom economy?
A
(Sum of Mr of the desired product/Sum of Mr of all products) x 100
