
(a)
Interpretation:
Alkali metal ion interferes that is expected to interfere with each of the ammonium-based electrodes has to be identified.
Concept Introduction:
Crown ether is macro cyclic scaffolds that are selective to carry particular metal ion. The metal ion that fits in the cavity of such ether is selectively bound by crown ether.
(b)
Interpretation:
Ratio of
Concept Introduction:
Selectivity coefficient may be defined as the ratio of equilibrium constants that can represent the extent to which certain substrate M can bind two unique ligands, N and O. Quantitatively it can be represented by expression indicated as follows:
Here,

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