Taking a suitable example, discuss the design of a solid state membrane electrode
Solid-state electrodes are miniaturized version of an electrochemical sensor. Solid state membrane electrodes are preferred over liquid membrane electrodes because they can easily be used in all kinds of media which are suitable for environmental analysis, food analysis, clinical analysis as well as for in vivo analysis.
Carbon materials in the form of graphite, glassy carbon, carbon fibres etc are important solid state electrodes for several reasons. This is because carbon has rich surface chemistry, which can be explored to influence reactivity. Also the adsorption on carbon surfaces can be used to enhance analytical utility. Adams, the
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NAA
Give the difference between thermometric and classical titrimetry.
What is meant by Ion Selective electrodes? Give their applications.
| To analyse a brass alloy, a 0.442 g sample is dissolved in acid to volume in a 500 cm3 volumetric flask. Electrolysis of a 10 cm3 sample at − 0.3 V vs. SCE reduces Cu2+ to Cu, requiring total charge of 16.11 C. Adjusting the potential of 0.6 V vs. SCE and completing the electrolysis requires 0.442 C to reduce Pb2+ to Pb. Report the percentage of Cu and Pb in the alloy. |
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How the conductance is varies with concentration? Explain with the help of suitable examples.
What is the cell potential of an electrochemical cell made of a cadmium electrode
in a 0.1 M Cd(NO3)2 solution and chromium electrode in a 1 × 10−4 M Cr(NO3)3
solution.
| What are molar conductivity and limited molar conductivity? Calculate the dissociation constant of 0.02 mol dm−3 ethanoic acid, if its molar conductivity is 11.57 × 10−4 S m2 mol−1 and limited molar conductivity is 3.90 × 10−2 S m2 mol−1. |
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