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Title: Moles Revision Notes / Cheat Sheet
Description: Everything about Moles & Titration. All formulas, definitions, units, key points and more in one place - all condensed.
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Karanvir Singh Kumar 10U

Moles
Revision Notes

REMEMBER
MULTIPLY BY STOICHIOMETRY
NUMBERS!

๐‘š๐‘œ๐‘™๐‘’๐‘  =

๐‘š๐‘Ž๐‘ ๐‘ 
๐ด๐‘Ÿ

๐‘š๐‘œ๐‘™๐‘’๐‘  = ๐‘ฃ๐‘œ๐‘™ ร— ๐‘๐‘œ๐‘›๐‘

REMEMBER
Convert all cm3 to dm3 by รท1000

๐‘ฃ๐‘œ๐‘™
๐‘š๐‘œ๐‘™๐‘’๐‘  =
24

vol = Volume (dm3)

Waters of Crystallisation
The number of moles of H2O per 1 mole of Ionic Compound -> (Always a whole number)

Example
CuSO4
...

Heat until the mass is constant โ€“ evaporate all the water (320g CuSO4 anhydrous + H2O)
Calculate the moles of CuSO4 anhydrous -> mol=mass/mr
-> 320/(64+32+(16*4)) = 2 mol
-> Calculate mass and moles of H2O -> 500-320 = 180h H2O = 180/18 = 10 mol
-> Find x / 1 mol CuSO4
...
5H2O

Empirical Formula
Example
Substance
Elements
Mass (g)
Mass / Atomic Mass
Ratio

Formula

Magnesium Oxide
Mg
O
0
...
06
0
...
3 0
...
0049
0
...
00375 รท0
...
31 (โ‰ˆ1) :
1
MgO

Karanvir Singh Kumar 10U

Yield
๐‘ฆ๐‘–๐‘’๐‘™๐‘‘ =

๐‘Ž๐‘๐‘ก๐‘ข๐‘Ž๐‘™ ๐‘š๐‘Ž๐‘ ๐‘  ๐‘œ๐‘“ ๐‘๐‘Ÿ๐‘œ๐‘‘๐‘ข๐‘๐‘ก
ร— 100
๐‘กโ„Ž๐‘’๐‘œ๐‘Ÿ๐‘’๐‘ก๐‘–๐‘๐‘Ž๐‘™ ๐‘š๐‘Ž๐‘ ๐‘  ๐‘œ๐‘“ ๐‘๐‘Ÿ๐‘œ๐‘‘๐‘ข๐‘๐‘ก
Express as a %age
...

Theoretical mass is given
...

Remember: Atom economy can be improved by selling all products
...


Titration Method:
1
...

2
...

3
...

4
...

5
...
Note the final volume reading
Title: Moles Revision Notes / Cheat Sheet
Description: Everything about Moles & Titration. All formulas, definitions, units, key points and more in one place - all condensed.
Buy These NotesPreview