Engineering Chemistry Laboratory Viva voice questions and answers
12. Estimation of sodium and potassium present in water using Flame photometer
Chemistry (Lab) Practical : Viva – voice questions & answers
Engineering Chemistry Laboratory : 12. Estimation of sodium and potassium present in water using Flame photometer : Viva – voice questions & answers
VIVA – VOICE QUESTIONS & ANSWERS
12. Estimation of sodium and potassium present in water using Flame photometer
1.
What is flame photometry?
It
is a method in which, the intensity of the emitted light is measured when a
atomised metal is introduced in to a flame.
2.
Name the important components of flame photometer.
1.
Burner 2. Mirror 3. Slits 4. Prism 5. Detector 6. Amplifier and Recorder
3.
What is calibration curve.
It
is the graph drawn between the solutions of known concentration vs intensity.
4.
How will you prepare 1 ppm solution of NaCl.
By
dissolving 2.54 gms of NaCl in 1 litre of distilled water. 1 ml = 1 ppm of NaCl
5.
How will you prepare 1 ppm solution of KCI.
By
disolving 1.809 gms of KCl in 1 litre of distilled water 1 ml = 1 ppm of KCI.
6.
What is the colour of the flame of Nations.
Yellow
7.
What is the wave length for Nations to be set in the instrument.
λ
= 586 nm
8.
Give some limitations of flame photometry
(a)
Only liquid samples must be used.
(b)
Other than I & II Group metals cannot be detected.
(c)
Molecular form of the metal can not be obtained. In for metal about the
9.
What is the wave length of K+ ions to be set in the instrument?
λ
= 766 nm
Engineering Chemistry Laboratory Viva voice questions and answers : Tag: : Chemistry (Lab) Practical : Viva – voice questions & answers - 12. Estimation of sodium and potassium present in water using Flame photometer
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