Class notes Analytical chemistry Analytical Chemistry

ANALYTICAL
CHEMISTRY




High Yield Notes

, NOTES
NOTES
ANALYTICAL CHEMISTRY
Analytical chemistry deals with
the separation and analysis of
sample compounds.
Chemical analysis can be
distributed into qualitative and
quantitative.


CLASSICAL METHOD
They are known as wet chemical Step 4: empirical formula :
methods or earliest methods. Take mole ratio %/atomic
mass
Combustion analysis Take simple ratio :
Helps determine the percentage mole ratio/smallest mole
composition, empirical formula of ratio
an unknown compound Get whole numbers
containing carbon and hydrogen Step 5: molecular formula =
Step 1: compound is burnt in Empirical formula x n, where
excess of oxygen. CO2 and H2O n=molecular formula
are formed. mass/empirical formula
Step 2: H2O is absorbed by mass.
Mg(ClO4)2 and CO2 is absorbed
by KOH.
Step 3: weight of CO2 and H2O is
determined which helps us find
their percentage.
% CO2 = mass of CO2 x 12/44 x
100/mass of compound
% H2O = mass of H2O x 2/18 x
100/mass of compound
% of O = %H - %CO2.
compund to be
analyzed
unsend oxygen
Oxygen leaves
added here




Water absorber Carbon dioxide absorber




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