144. For indicator electrodes, which statements are true? I Indicator electrodes
ID: 1482611 • Letter: 1
Question
144. For indicator electrodes, which statements are true?
I Indicator electrodes are made from relatively inert metals.
II Indicator electrodes work best when the electrode surface is large and clean.
III Platinum is a common indicator electrode.
IV Platinum electrodes are more inert than gold electrodes.
A) I, III, and IV
B) II and III
C) I, II, and IV
D) I, II, and III
E) I, II, III, and IV
145&146&147. The potential of a silver electrode is measured relative to an Ag-AgCl electrode for the titration of 100.0 mL of 0.100 M Cl with 0.100 M Ag+. What is the potential after 75.00 mL of titrant is added. Eo = 0.799 V for Ag+, E = 0.197 V for the Ag-AgCl electrode and Ksp = 1.8 × 1010.
A) 0.493 V
B) 1.070 V
C) 0.521 V
D) 1.267 V
E) 0.134 V
Explanation / Answer
here option B is correct
platinum is common indicator electrodes and indicator electrides work best when surface is large and clean
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