The voltage (sometimes called emf),
E mV, generated in a combination pH electrode for a given
pH value is given by the theoretical Nernst equation:
E =
E_{0} - 0.198×
T×(
pH - 7.0) mV
where
T is the temperature in ºK and
E_{0} is a small constant voltage which depends on the particular electrode.
At
T = 298 K, an increase of 1.0 on the pH scale gives a change in
E equal to -59mV.
Check ALL of the following statements that will then be true:
(Click here for the
Video Answer)