138. Задачка по химии №013 824
115. Calculate the potential of a quinhydrode electrode immersed in an acid solution with pH = 2 with respect to a standard hydrogen electrode.
The standard potential of the hydrogen electrode (reference electrode; ES) is 0 V, and of the quinhydrone (indicator electrode; IE) 0.700 V.
The dependence of the potential of the quinhydrone electrode on the concentration of hydrogen ions, and, consequently, on pH, has the following form:
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