Equations Flashcards
1
Q
How to calculate concentration (titration questions)
A
Conc = m/ volume (dm3)
2
Q
How to calculate the volume in a gas
A
Volume = moles x 24dm3
3
Q
Ideal gas equation
A
Pv = nrt
4
Q
Conversion of Mol/dm3 into g/dm3
A
Multiply the mol/dm3 by the relative formula mass of the compound
5
Q
Why isnt the percentage yield always 100%
A
- not all of the reactant may react
- side reactions may take place making other products
- Our product may be lost e.g in filtration
6
Q
How to calculate percentage yield
A
Yield/ maximum theoretical yield x 100
7
Q
how to work out percentage uncertainty
A
uncertainty/ quantity measure x 1000
8
Q
in what cases do you multiply the uncertainty by 2
A
temperature change
mass change
change in volume with a burette
9
Q
unit for molar mass
A
g mol -1
