L11 - Atom Economy + Yield Flashcards
1
Q
what is % yield?
A
the amount of product you actually make as a % of the amount you should theoretically make
2
Q
How do you calculate % yield?
A
actual amount of product / expected mass product x100
3
Q
Why do very few chemical reactions have a yield of 100%?
4
A
The reactant may not be pure
Some of the products may be left behind in the apparatus
The reaction may not have completely finished
Some reactants may give some unexpected products
4
Q
What is atom economy?
A
the mass of the product you want as a % of the mass of all the products you make
5
Q
How do you calculate atom economy?
A
mass of useful product / mass of all reactant x100
