ANALYTICAL CHEMISTRY
ANALYTICAL CHEMISTRY EXAM GRADED A+
ANALYTICAL CHEMISTRY - correct answer Branch of chemistry that deals
with the separation, identification and composition of matter
Gravimetric Method - correct answer Measurement of mass of substance
that is chemically related to the analyte
Volumetric Method - correct answer Measures the volume of solution
necessary to read completely with the analyte.
Spectroscopic Method - correct answer Measures the electromagnetic
radiation produced by the analyte or its interactions with it.
, ANALYTICAL CHEMISTRY
Electroanalytic Method - correct answer Measures the electrical properties
of the analyte such as current, potential, resistance, and amount of
charge
Kjeldahl Method - correct answer Determination of Organic Nitrogen
(Amines, Amides, Nitriles and Nitro Group: %N or %Protein
Double Indicator Method - correct answer To determine the composition of
a soda ash sample. Two indicators (one alkaline range one acidic)
Example: Phenolphthalein endpoint (Na2CO3 and NaOH) and methyl
red endpoint (Na2CO3 and NaHCO3)
Argentometric titration - correct answer Titration with Silver Nitrate AgNO3
Mohr Method - correct answer Direct method for halides and cyanides;
Titration is carried out between pH of 7-10. Usually, a low concentration
of chromate is desired to detect the end point clearly since a chromate
ion imparts an intense yellow color.
Volhard Method - correct answer For the formation of a colored
complexion; Direct method for silver; Indirect method for halides;
Titration is carried out in acidic condition to hasten precipitation of
ferric ion to its hydrated oxide form.
Fajan's Method - correct answer For the formation of a colored adsorption
complex; same as Mohr's but uses DCF dichlorofluorescein; between pH
ANALYTICAL CHEMISTRY EXAM GRADED A+
ANALYTICAL CHEMISTRY - correct answer Branch of chemistry that deals
with the separation, identification and composition of matter
Gravimetric Method - correct answer Measurement of mass of substance
that is chemically related to the analyte
Volumetric Method - correct answer Measures the volume of solution
necessary to read completely with the analyte.
Spectroscopic Method - correct answer Measures the electromagnetic
radiation produced by the analyte or its interactions with it.
, ANALYTICAL CHEMISTRY
Electroanalytic Method - correct answer Measures the electrical properties
of the analyte such as current, potential, resistance, and amount of
charge
Kjeldahl Method - correct answer Determination of Organic Nitrogen
(Amines, Amides, Nitriles and Nitro Group: %N or %Protein
Double Indicator Method - correct answer To determine the composition of
a soda ash sample. Two indicators (one alkaline range one acidic)
Example: Phenolphthalein endpoint (Na2CO3 and NaOH) and methyl
red endpoint (Na2CO3 and NaHCO3)
Argentometric titration - correct answer Titration with Silver Nitrate AgNO3
Mohr Method - correct answer Direct method for halides and cyanides;
Titration is carried out between pH of 7-10. Usually, a low concentration
of chromate is desired to detect the end point clearly since a chromate
ion imparts an intense yellow color.
Volhard Method - correct answer For the formation of a colored
complexion; Direct method for silver; Indirect method for halides;
Titration is carried out in acidic condition to hasten precipitation of
ferric ion to its hydrated oxide form.
Fajan's Method - correct answer For the formation of a colored adsorption
complex; same as Mohr's but uses DCF dichlorofluorescein; between pH
