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What is E0 in given equation?(a) induced emf(b) Faradays Constant(c) pH value deviation from 7(d) standard potentialThis question was addressed to me in semester exam.This is a very interesting question from Spirometry in section Pulmonary Function Analysers of Biomedical Instrumentation

Answer»

Correct choice is (d) standard potential

The best explanation: The potential (E) of the glass electrode may be written by means of the Nernst

equation:

where, EO = standard potential R = gas constant T = absolute TEMPERATURE F = Faraday constant DPH = PH value deviation from 7.The above relation shows that the emf developed in the electro-chemical pH cell is a linear function of DpH.



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