Past Question CHM323 2021/2022 SESSION- FUBK
CHM323 : PRACTICAL CHEMISTRY IV
UNITS : 1
INSTRUCTIONS : Answer all questions
TIME ALLOWED : 1hr 30mins
First Semester Examination
Q1. a). Explain the principle of flame photometry and mention its advantages over spectrophotometric techniques.
b). Give three uses of flame photometry
c). List five basic components of flame photometer with their functions.
d). Show the preparation of 1000ppm sodium stock solution using sodium chloride salt in 500cm3 volumetric flask.
Q2. ai). Differentiate between colorimetric and spectrophotometric analysis.
ii). Outline two uses of each techniques.
b). Explain the preparation of the following solutions in the laboratory.
i). 2M nitric acid solution from concentrated 15M in 250cm3 volumetric flask.
ii). 100ppm Cu stock solution from CuSO4.5H2O salt in 500cm3 standard flask.
c). Outline the five stages of performing paper chromatography in the laboratory.
d). Draw a labeled diagram of simple chromatography of three separated components of metal ions mixture (ABC).
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