Percentage Yield Flashcards
1
Q
How do you work out the percentage yield?
A
Actual yield
————– x100
Predicted yield
2
Q
What does % yield actually tell you?
A
How big were your chances to get the yield you predicted
3
Q
What is 100% yield?
A
You got all the product you expected to get
4
Q
What is 50% yield
A
You got half of the product you expected to get
5
Q
Why do you never get 100% yield?
A
Some product get lost on the way
- Evaporation
- especially when getting heated - Not all reactants will react
- can also reverse in reversible reaction (like the haber process) - Filtration
- some liquid is always left - Transferring liquid
- some of it is always left
