2.1.3 Percentage Yields and Atom Economy Flashcards
1
Q
What’s percentage yield equation
A
Mass of product actually made/theoretical mass of product x100
2
Q
3 reasons percentage yield is often less than 100%
A
Side reactions occur
Loss of product
Reversible reactions (doesn’t go to completion)
3
Q
Where is it important that as many of the atoms in the reactants end up as the useful product I.e less waste
A
In an industrial plant where reactions are done on a large scale (tonnes) in giant Reaction vessels
4
Q
When is there greater atom economy
A
When more reactant atoms are put to good use to become useful products
5
Q
What’s the equation for atom economy
A
Total Ar’s useful product/total Ar’s of reactants x100
