U3-2-2 - Percentage Yield Flashcards
Part of the Getting the Most from Reactants topic from Unit 3 of Higher Chemistry, Chemistry in Society
1
Q
How is the actual yield obtained?
A
From an experiment (this is the measured yield)
2
Q
How is the theoretical yield obtained?
A
From the balanced equation (this is the calculated yield)
3
Q
Reactions never have a 100% yield. Give one reason why.
A
Any one of:
* some reactants remain unreacted
* competing reactions (e.g. reverse reaction)
* final product needs to be purified
* human error.
