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Advanced Analytical Chemistry Virtual Lab
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Polarography - Determination of Unknown Concentration of Cadmium
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Polarography - Determination of Unknown Concentration of Cadmium
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Theory
Procedure
Self Evaluation
Simulator
Assignment
Reference
Feedback
1)
Which of the following the polarography different from voltammetry?
All the above.
Helps in determining the electrolysis action of solutions of electroreducible substances.
Helps in determining the electrolysis action of solutions of electrooxidisable substances.
The working electrode takes the form of a dropping mercury electrode.
2)
Characteristic features of a polarogram is/are
Sigmoid in shape
Obtained by plotting the current versus potential response.
Difference exists between potential of reference electrode and DME.
All the above.
3)
Limiting current in polarogram means
The current that exist in between the limiting diffusion plateau and the residual current.
Non faradaic current at the foot of the wave.
Average diffusion current during the life of the drop.
The sum of the diffusion residual current.
4)
Ilkovic equation can be best described by the equation:
id = 708 n D¹/² m²/³ t¹/⁶ c
id = 78 n D²/³ m³/² t²/³ c
id = 78 n D²/³ m¹/² t¹/³ c
id = 708 n D²/³ m¹/² t¹/⁸ c
5)
In polarographic technique the formation of the new drop of the drop is controlled by
Auxillary electrode
Polarographic cell
Capillary tube
Platinum electrode
Cite this Simulator:
vlab.amrita.edu,. (2011). Polarography - Determination of Unknown Concentration of Cadmium. Retrieved 28 March 2024, from vlab.amrita.edu/?sub=2&brch=294&sim=687&cnt=3
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