VOLUMETRIC ANALYSIS: ACIDIMETRIC ANALYSIS Flashcards
Are chemical processes in which an acid (proton donor) reacts with a base (proton acceptor).
NEUTRLIZATION
The direct or residual titrimetric analysis of bases using an accurately measured VOLUME OF ACID.
ACIDIMETRY
a MACRO method in which the ammonia is distilled into excess boric acid solution
METHOD 1
a SEMIMICRO method in which SMALLER SAMPLES are employed using semimicro Kjeldahl Apparatus.
METHOD 2
The direct or residual titrimetric analysis of acids using an accurately measured VOLUME OF ALKALI.
ALKALIMETRY
indicators of Inorganic acids
methyl red or phenolphthalein
indicator in Organic acids
phenolphthalein
aspirin hydrolysis products
acetic acid & salicylic acid
in ACIDIMETRY in NON-AQUEIUS solvents, the choice of solvent is determined by the _________ of the substance to be assayed
BASIC CHARACTER
the ALKALIMETRY in NON-AQ solvents use _____ as solvents for the titration of WEAK ACIDS such as enols
STRONG BASES
Dimethylformamide and pyridine used as solvents for
medium-strength acidic substances
________ is not used since it may produce a GELATINOUS product
potassium methoxide
Ethylenediamine, n-butylamine & morpholine are strong bases used as solvents for the titration of ________ such as enols
WEAK ACIDS
sample: BASE
titrant: ACID
ACIDIMETRY
sample: ACID
titrant: BASE
ALKALIMETRY
products of a neutralization reaction in aqueous solution
WATER & SALT
ASSAY OF SODIUM BICARBONATE:
titrant
1N H2SO4
ASSAY OF SODIUM BICARBONATE:
indicator
METHYL ORANGE
ASSAY OF SODIUM BICARBONATE:
endpoint
PINK
ASSAY OF NaOH:
titrant
1N H2SO4
ASSAY OF NaOH:
indicator
PHENOLPHTHALEIN
ASSAY OF NaOH:
end point
PINK
ASSAY OF ZnO:
titrant
1N H2SO4
1N NaOH
ASSAY OF ZnO:
indicator
METHYL ORANGE
ASSAY OF ZnO:
end point
YELLOW
ASSAY OF Milk of magnesia (MgOH):
titrant
1N H2SO4
ASSAY OF Milk of magnesia (MgOH):
indicator
METHYL RED
ASSAY OF Milk of magnesia (MgOH):
endpoint
YELLOW
ASSAY OF HCl:
titrant
1N NaOH
ASSAY OF HCl:
indicator
METHYL RED
ASSAY OF HCl:
endpoint
PINK
ASSAY OF Boric acid:
titrant
1N NaOH
ASSAY OF Boric acid:
indicator
PHENOLPHTHALEIN
ASSAY OF Boric acid:
endpoint
PINK
ASSAY OF TARTARIC ACID:
titrant
1N NaOH
ASSAY OF TARTARIC ACID:
indicator
PHENOLPHTHALEIN
ASSAY OF TARTARIC ACID:
endpoint
PINK
ASSAY OF ASPIRIN:
titrant
1N H2SO4
1N NaOH
ASSAY OF ASPIRIN:
indicator
PHENOLPHTHALEIN
ASSAY OF ASPIRIN:
endpoint
DISAPPEARANCE OF PINK COLOR
ASSAY OF METHACHOLINE CHLORIDE:
titrant
O.1N PERCHLORIC ACID
ASSAY OF METHACHOLINE CHLORIDE:
indicator
CRYSTAL VIOLET
ASSAY OF METHACHOLINE CHLORIDE:
endpoint
BLUE GREEN
ASSAY OF PHENYTOIN:
titrant
0.1N SODIUM METHOXIDE
ASSAY OF PHENYTOIN:
indicator
AZO VIOLET
ASSAY OF PHENYTOIN:
endpoint
BLUE