C7 Chemical calculations with moles Flashcards
1
Q
What is the yield of a reaction?
A
mass of product obtained from the reaction
2
Q
Why is the actual yield always less than the theoretical yield of a reaction?
A
~reaction may be
reversible
~some product can be lost
on separation
3
Q
What is percentage yield?
A
actual yield as a proportion of the theoretical yield
4
Q
What is atom economy?
A
measure of how many atoms of the reactants end up as useful products
5
Q
What is titration?
A
method used to calculate the concentration of an unknown solution
6
Q
Why is a white tile used in titration?
A
To see the colour changing better
7
Q
What are concordant titres?
A
titres within 0.1^3 of each other
8
Q
What volume does one mole of any gas occupy?
A
24dm^3
