試題詳解

37 Which of the following statements associated with the ion-selective electrode is (are) CORRECT?
(i) In place of aqueous NaCl in the salt bridge, the junction potential can be reduced to 0.1 mV.
(ii) A typical pH combination electrode includes a working electrode, a glass membrane, a reference electrode, and a counter electrode.
(iii) The boundary potential is the difference between the potential at the internal and external surface of the glass membrane.
(iv) The sodium error of the pH meter occurs at low pH conditions.
(A) iii
(B) iii, iv
(C) i, iii
(D) ii
(E) i, ii, iii, iv